Ques:- Design an elevator system for a 100 story building. Address all issues, like number of elevators, speed of each (Not numerically), waiting times etc. There would be 100-200 people living/working on each floor.
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Ques:- Mr. T has a wrong weighing pan. One arm is lengthier than other. 1 kilogram on left balances 8 melons on right. 1 kilogram on right balances 2 melons on left. If all melons are equal in weight,what is the weight of a single melon?
Recent Answer : Added by samarth khare On 2021-06-23 17:56:06:
Suppose the lengthier arm of weighing pan is of x cm and other arm is y cm .Also let weight if each melon be m kg.
so applying equilibrium of torque principles ,we get
case 1:-
1x-8my=0
case 2:-
2mx-1y=0
using case 1 equation , we substitute value of x into case 2 equation;
16mmy-1y=0
(16mm-1)y=0
y is length of weighing arm and cannot be 0,
therefore ,
16mm-1 =0
16mm=1
mm=1/16
m= square root (1/16)
m=+-1/4
m is weight of melon and cant be negative.
Hence m, weight of one melon is 1/4 kg
Ques:- Find the missing number 24, 23, 48,?, 568
Recent Answer : Added by mahi On 2020-11-08 02:14:29:
47
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Ques:- What is the minimum number of four digits formed by using the digit 2, 3, 0, 7?
A. 2047
B. 2247
C. 2407
D. 2470
Recent Answer : Added by Preeti On 2022-03-09 16:29:53:
0237
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Ques:- A husband and wife has a combined age of 91.the husband is now twice as old as his wife was when he was as old as she is now. How old are they?
Recent Answer : Added by Admin On 2020-05-17 12:04:21:
ans is C.
let H be present age of husaband.W be present age of wife.
H+W=91.
now let diff between their ages be x.that is H-W=x.
now when husband is W yaers old, his wife must be W-x years
old.and it is given that H=2(W-x). so 2W-H=2x. and H-
W=x.eliminating x we get 4W=3H. but H+W=91, so solving thse
two H=52 W=39.
Ques:- c=a/b ; a-1=c What is the relation between a&b
Recent Answer : Added by Admin On 2020-05-17 11:59:44:
c=a/b
c=a-1
=>b=a/c
=>b=a/a-1
Ques:- Sangeeta remembers that her father’s birthday was certainly after eight but before thirteenth of December. Her sister Natasha remembers that their father’s birthday was definitely after ninth but before fourteenth of December. On which date of December was their father’s birthday?
Ques:- Jarius and Kylar are playing the game. If Jarius wins, then he wins twice as many games as Kylar. If Jarius loses, then Kylar wins as the same number of games that Jarius wins. How many do Jarius and Kylar play before this match?
Recent Answer : Added by sk On 2022-08-14 16:41:57:
5 (3+2)
if he wins then it becomes 4 double than 2
and if looses then opponent becomes 3 which is equal.
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Ques:- If the probability of observing a car in 30 minutes on a highway is 0.95, what is the probability of observing a car in 10 minutes (assuming constant default probability)?
Ques:- What is the 12th term of the series 2, 5, 8, …. ?
Recent Answer : Added by Mukesh On 2022-08-14 16:31:48:
a = 2
d = 5 – 2 = 3
Then 12th term is :
This in arithmetic progression
L = a + (12 – 1) d
L = 2 + 11 * 3
L = 2 + 33 = 35
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Ques:- Three friends divided some bullets equally. After all of them shot 4 bullets the total number of bullets remaining is equal to the bullets each had after division. Find the original number divided?
Recent Answer : Added by Admin On 2020-05-17 12:01:02:
Ans =18
Explanation:
Assume that initial there were 3*X bullets.
So they got X bullets each after division.
All of them shot 4 bullets. So now they have (X – 4)
bullets each.
But it is given that,after they shot 4 bullets each, total
number of bullets remaining is equal to the bullets each
had after division i.e. X
Therefore, the equation is
3 * (X – 4) = X
3 * X – 12 = X
2 * X = 12
X = 6
Therefore the total bullets before division is = 3 * X = 18
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Ques:- One pipe can fill a tank three times as fast as another pipe. If together the two pipes can fill tank in 36 min, then the slower pipe alone will be able to fill the tank in?
Recent Answer : Added by Thrinayani sanagapati On 2022-08-14 16:28:52:
1/x+1/3x=1/36
4/3x=1/36
36*4=3x
X=48
So the slower pipe alone fill the tank in 48 minutes.
Ques:- Ram was travailing back from his friend house in his old ambassador. He could only travel along at a steady 30 miles per hr and managed a paltry 20 miles per litere of fuel. At the start of the journey he has placed exactly 10 litre of fuel into a tank. He knew though that the fuel tank lost fuel at the rate of half a liter per hhour. As ram arrived home the car stopped because it had run out of a fuel and h only just made it. How far was his friends house from rams. a.200 b.150 3.210 d170
Recent Answer : Added by Admin On 2020-05-17 12:04:12:
Ans 200
that he will lost 1.5 ltr in an hour
so he will lost that 10 ltr in 10/1.5=6.67hour
distance travelled in 6.67 hour is=30*6.67=200 km
Ques:- Find out the wrong number in each sequence:
105, 85, 60, 30, 0, – 45, – 90
A. 85
B. 60
C. -45
Recent Answer : Added by Rahul On 2022-08-14 16:28:33:
85
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Suppose the lengthier arm of weighing pan is of x cm and other arm is y cm .Also let weight if each melon be m kg.
so applying equilibrium of torque principles ,we get
case 1:-
1x-8my=0
case 2:-
2mx-1y=0
using case 1 equation , we substitute value of x into case 2 equation;
16mmy-1y=0
(16mm-1)y=0
y is length of weighing arm and cannot be 0,
therefore ,
16mm-1 =0
16mm=1
mm=1/16
m= square root (1/16)
m=+-1/4
m is weight of melon and cant be negative.
Hence m, weight of one melon is 1/4 kg