If a car starts from A towards B with some velocity.Due to
some problem in the engine after travelling 30km, the car
goes with 4/5 th of its actual velocity The car reaches B
45 min 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 ?
- 5 Answers
- 18875 Views
- IBM, I also Faced
- E-Mail Answers
Answer Posted / ashish madhavi
the answer is
initial velocity is 25 km/hr
and distance is 105 km
explanation
let distance = xKm and Velocity = yKm/hr
form 2 equations
total time = time from start to first break point+ time
from first breakpoint to destination
(time = distance/speed)
total time fromassumption = (x/y)
for first case
total time = (x/y)+(3/4){36 minutes converted into hrs}
time from start to first break point = (30/y)
time from first break point to destination = (x-30/(4/5y))
{since velocity has decreased to 4/5}
hence
x/y + 3/4 = 30/y + (x-30/(4/5y)) .......... equatiion 1
similarly equation 2 is derived from 2nd case given as:
x/y + 3/5 = 45/y + (x-45/(4/5y)) .......... equatiion 2
solving v get x=105
and y = 25
its seems to be lengthy in reading the solution but trust
me it wont take more than 2 mins to solve the question
| Is This Answer Correct ? | 25 Yes | 5 No |
Post New Answer View All Answers
In a well of 20feet depth, a frog jumps 5feet up in the morning and comes 4feet down in the evening, on which day the frog gets out of the well.
Ramesh owns 2/3 of the travel business and sells 3/4 of his shares for Rs. 75000. What is the value of his travel business?
the graph was given.the x and y axes were there.the line is intersecting them.the points of intersection were y=3,x=0 and x=-2,y=0.write the equation of line.
The ratio between the perimeter and the breadth of a rectangle is 5: 1. What is the length of the rectangle If the area of the rectangle is 216 sq. cm?
Two ladies ,two men sit in north east west south position of rectangular table. Using clues identify their position ?
In a class composed of x girls and y boys what part of the class is composed of girls
There are 8 stamps, 4 Red and 4 Green. There are three logicians also. One moderator sticks thow stamps each on the forhead of each logician such that each of them can see all the stamps except those on his forhead and the two in moderator's pocket. Then the moderator asked each whether he knows the colors of the stamps he wears? Then the answeres were: A: "No" B: "No" C: "No" A: "No" B: "Yes" What were the colours of the stamps that B wears?
If the area of a square has increased by 69%,by what % has its side increased?
Two trains 100 meters and 120 meters long are running in the same directions with speed of 72 km/hr and 54 km./hr. in how much time will the first train cross the second?
a train runs first half of the distance at 40 km/hr and the remaining half at 60 km/hr. What is the average speed for the entire journey?
Why do we buy you?
For 1:2:4 ratios the weight of cement is 50 kg then how many kg are the weight of sand and aggregate?
A man runs towards the east direction and then takes his right. Then he takes a left and again 50 degrees to his right. What is the direction in which he is moving now?
A person was fined for exceeding the speed limit by 10 mph. Another person was also fined for exceeding same speed limit by twice the same. If the second person was travelling at a speed of 35 mph, find the speed
Ganesh and Shankar travel abroad and take more luggage than the airlines allow. They have to pay extra money for it. They carry 52 kgs together and pay $60 and $100 respectively. Now, if the same luggage was carried by only Ganesh it would cost him $340. If the airlines charges only at one rate for extra luggage what is the maximum luggage that a person can carry without paying extra?
