Ques:- If a car starts from A towards B with some velocity due to some problem in the engine after travelling 30km.If the car goes with 4/5 th of its actuval velocity the car reaches B 45min later to the actual time. If the car engine fails ofter travelling 45km, the car reaches the destination B 36min late to the actual time , what is the initial velocity of car and what is the distance between A and B in km
Recent Answer : Added by DK BOSS On 2021-07-17 06:18:31:
Ans. let x is distance from A to B
and y is initial speed.
30/y+(x-30)5/4y -x/y = 3/4
=> 4x-12y=120 —-(1).
45/y + (x-45)5/4y -x/y=3/5
=> 5x-12y=225 ——-(2).
From equ (1) and equ (2) we will get.
x=25 and y=105
so initial speed is 25 km/hr
and Distance From A to B is 105 km
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Ques:- An amount of Rs. 3000 becomes Rs. 3600 in four years at simple interest. If the rate of interest was 1% more, then what was be the total amount?
Recent Answer : Added by Sakshi On 2021-08-08 09:30:35:
3606
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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:- Kailash remembers that his brother Deepak’s birthday falls after 20th May but before 28th May, while Geetha remembers that Deepak’s birthday falls before 22nd May but after 12th May. On what date Deepak’s birthday falls?
Recent Answer : Added by sam On 2021-11-25 15:47:58:
May 21
Ques:- If an insurance company pays $5000 for complete loss, $1500 in case of a loss of $2000 and more and nothing in case the loss is less that $2000. It obviously pays nothing in case of no loss. If the probability of the first 3 events are 0.02,0.10 and 0.3 , find what should the company charge in order to make a profit of $50 from each customer ?
Ques:- Do you feel you work more effectively on a one to one basis or in a group situation?
Recent Answer : Added by RITESH KATARWAR On 2021-11-18 17:15:58:
group wise work is use full and effectively
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Ques:- The sum of the squares of two consecutive positive integers exceeds their product by 91. Find the integers?
Ques:- Find out the wrong number in each sequence:
125, 123, 120, 115, 108, 100, 84
A. 84
B. 100
C. 115
D. 123
Recent Answer : Added by narendra On 2022-09-18 09:01:32:
b
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Recent Answer : Added by Javed Walandkar On 2022-08-14 16:35:09:
17
Ques:- A town has a population of 500000 and 42% of males and 28% of females are married to the same town. Find the total number of males.
Recent Answer : Added by arjun On 2021-12-09 18:40:05:
20000
Ques:- A person pays a tax of 10%,if his salary increases by 10% he need to pay a tax of 15%.The total gain he obtains after increment in salary is 350Rs . What is his salary?
Recent Answer : Added by Admin On 2020-05-17 12:04:35:
7000
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Ques:- Alok ordered 16 chapatis, 5 plates of rice, 7 plates of mixed vegetable and 6 ice-cream cups. The cost of each chapati is Rs.6, that of each plate of rice is Rs.45 and that of mixed vegetable is Rs.70. The amount that Alok paid the cashier was Rs.961. Find the cost of each ice-cream cup?
Recent Answer : Added by Nicey On 2022-03-09 16:42:07:
16 chapatis* 6 Rs= 96
5 plates of rice * 45 Rs = 225
7 plates of mixed vegetable * 70 Rs = 490
6 ice-cream * ??
The amount that Alok paid the cashier was Rs.961
96+225+490 = 811
961-811= 150
150/6 = 25
The cost of each ice-cream cup is 25 .Rs
Ques:- There is a 5digit no. 3 pairs of sum is eleven each. Last digit is 3 times the first one. 3 rd digit is 3 less than the second. 4 th digit is 4 more than the second one. Find the digit.
Recent Answer : Added by Admin On 2020-05-17 11:59:40:
let first digit be ‘X’
then 5th digit is ‘3X’
let 2nd digit be ‘Y’
then 3rd digit is ‘Y-3’
and 4th digit is ‘Y+4’
then the no is ‘(X)(Y)(Y-3)(Y+4)(3X)’
from the above we can say 3X<=9
so X<=3 and any of the digit in the number is <=9
and also given that 3 pairs sum is 11...
so make trial and error..
if X=1...any of the no is 10 which is wrong trial....
if X=2...then let Y+4=9 ==> Y=5
then no is 25296
first pair 2+9=11
second pair 2+9=11
third pair 5+6=11
now the answer is 25296
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Ques:- area of triangle=1/2*b*h base incresed by 4 times & height is devided by 2, the net effect of area
Recent Answer : Added by Admin On 2020-05-17 11:59:59:
X = 1/2 * b*h
base incresed by 4 times & height
is devided by 2
X = 1/2 * 4b * h/2
X = h/4 * 4b
X = hb
Ques:- At what rate of interest is an amount doubled in two years, when compounded annually?
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Ans. let x is distance from A to B
and y is initial speed.
30/y+(x-30)5/4y -x/y = 3/4
=> 4x-12y=120 —-(1).
45/y + (x-45)5/4y -x/y=3/5
=> 5x-12y=225 ——-(2).
From equ (1) and equ (2) we will get.
x=25 and y=105
so initial speed is 25 km/hr
and Distance From A to B is 105 km