Ques:- A train covered x km at 40 kmph and another 2x km at 20 kmph. Find the average speed of the train in covering the entire 3x km.
Recent Answer : Added by Rakesh Keshri On 2021-09-07 17:39:41:
24kmph
time taken = x/40 + 2x/20
=> x=8
so, 3x = 24
Ques:- A train 240 m long passed a pole in 24 sec. How long will it take to pass a platform 650 m long?
Recent Answer : Added by dumeel kuppam vavvaalu On 2021-08-25 14:15:33:
From the first statement
Speed=distance/time
=>240/24=10m/s
so speed=10m/s
From the second statement
distance=length of the platform+length of the train=650+240=890m
Time=distance/speed
here, the speed of the train is already calculated
=>890/10=89s
So the time taken by the train to cross the platform is 89 seconds
Ques:- A motorcyclist goes from Bombay to Pune, a distance of 192 kms at an average of 32 kmph speed. Another man starts from Bombay by car 2 ½ hours after the first, and reaches Pune ½ hour earlier. What is the ratio of the speed of the motorcycle and the car?
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Ques:- The average length of three tapes is 6800 feet. None of the tapes is less than 6400 feet. What is the greatest possible length of one of the other tapes?
Recent Answer : Added by Admin On 2020-05-17 12:00:30:
x+y+z
—– = 6800
3
x>=6400
6400 + y + z = 20400
y + z = 14000
to get the greatest of y and z, lets assume y = 6400
so, z = 7600
so ANS is 7600
Ques:- One person is wearing Black and White shoes as his pair. If he is having 20 white and 20 Black shoes. What will be the less number of time he have try to take his correct pair of shoes.
Ques:- What is the number of zeros of the product of the first 100 numbers ?
Recent Answer : Added by Admin On 2020-05-17 12:05:49:
24.
exp: 0 is formed by multiplying 5 with 2. so first we find
how many 5’s and 2’s are there in 100!.
No of 5’s : 100/5=20/5=4/5.
20 +4 =24.
No of 2’s : 100/2=50/2=25/2=12/2=6/2=3/2=1/2.
50 +25 +12 +6 +3 +1.
It has 24 5’s and 2’s.
so the no. of zeros=24.
Ques:- Mention how many times a day do a clock’s hands overlap?
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Ques:- The diameters of two spheres are in the ratio 1:2 what is the ratio of their surface area?
Recent Answer : Added by Jhanvi Puri On 2021-08-15 03:37:35:
3.14
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Ques:- 30 men can make 120 articles in 8 days working 10 hours/day. If 10 men leave the work after 4 days, then how many hours per day should the rest of the men work to complete the job as per the schedule? 15 22 12 18
Ques:- What is your contribution of the Branch?
Recent Answer : Added by Pallavi On 2022-04-02 06:59:53:
Very great things your doing
Ques:- How long you will stay in our company?
Ques:- 2/3 of corckery(plates) are broken, 1/2 have someother thing(handle) broken , 1/4 are both broken and handle broken. Ultimately only 2 pieces of corckery were without any defect. How many crockery were there in total.
Recent Answer : Added by Admin On 2020-05-17 12:02:29:
let no of total crockery =x
2x/3 crockery broken
x/2 handle broken
x/4 both brocken
2x/3+x/2-x/4 = no of total broken(crockery or handle)
=11x/12
unbroken =x-11x/12=x/12
x/12=2(given in question)
x=24
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Ques:- What is the optimum number of operations for 2*(x**3)+3*(x**2)+5*x+5?
Recent Answer : Added by DK BOSS On 2021-07-17 06:19:06:
five multiplication & three addtion
Ques:- A light bulb is hanging in a room. Outside of the room there are three switches, of which only one is connected to the lamp. In the starting situation, all switches are 'off' and the bulb is not lit. If it is allowed to check in the room only once.How would you know which is the switch?
Recent Answer : Added by Mukesh On 2022-08-14 18:02:46:
Put switch 1 on and leave it on for 2 minutes, then switch it off.
Put switch 2 on and leave it on, then walk into the room.
If the light is on, the answer is switch 2.
If the light is off but the bulb is warm when you feel it, the answer is switch 1.
If the light is off and the bulb is cold when you feel it, the answer is switch 3.
Ques:- The difference between the place value of 7 and 3 in the number 527435 is
A. 4
B. 5
C. 45
D. 6970
Recent Answer : Added by narendra On 2022-09-18 09:02:58:
D
Ques:- If two cards are taken one after another without replacing from a pack of 52 cards what is the probability for the two cards be queen
Recent Answer : Added by Andrei On 2021-05-06 12:41:11:
4/52 * 3/51
Ques:- A circle is inscribed in a Triangle of side 6cm. What is the area of circle?
Recent Answer : Added by ankita On 2022-08-14 16:34:24:
27 root 3
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Ques:- If point P is on line segment AB, then which of the following is always true? (1) AP = PB (2) AP > PB (3) PB > AP (4) AB > AP (5) AB > AP + PB
Recent Answer : Added by Miss Dorothy Aceng On 2022-09-02 17:03:44:
option 5
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Ques:- A 4 digit no may consist of the digits 6,2,7,5 where none of the nos are repeated.Find the possible no of combinations divisible by 36?
Recent Answer : Added by Admin On 2020-05-17 12:02:15:
no combinations is there because a number divisible by 36
also divisible by its divisors anu.sum of 4 digits=20,whis
is not multiple of 3.so it is cannot divisible by 3
24kmph
time taken = x/40 + 2x/20
=> x=8
so, 3x = 24