Question
A train overtakes a scooterist who is moving in the same
direction at 36 km/h. If the train takes 18 seconds to pass the scooterist and its speed is 2.5 times that of the scooter, what is the length of the train?Solution
ATQ,
Speed of the scooter = 36 × (5/18) = 10 m/s
So, speed of the train = 10 × 2.5 = 25 m/s
Let the length of the train be 'x' metres
ATQ:
x / (25 - 10) = 18
So, x = 270
Length of the train = 270 metres
How many km per hour does a man walk who passes through a street 500 m long in 25 minutes?
Bus X left Delhi for Jaipur at 4:00 am and Bus Y left Jaipur for Delhi at 6:00 am, while at 8:00 am the distance between both buses X and Y is (3T+2) km...
John travelled a total distance of 432 km. He covered 5/8 of this distance at a constant speed of 30 km/h. To complete the entire journey in 13.5 hours,...
If a car runs at 30 km/hr, it reaches its destination late by 17 minutes but if runs at 45 km/hr it is late by 9 minutes. What is the correct time for t...
A person starts jogging from park gate 'A' at 6:30 AM at a speed of 8 km/h. Another person starts from the same gate at 8:00 AM, jogging in the same dir...
The speed of a bike increases by 3 km/hr after every 1 hour. If the distance travelled by the bike in 1st hour is 22 km, the find the total distance tra...
A boy goes to school with a speed of 60 km/h and comes back with a speed of 40 km/h. find his average speed?
A bike completes a journey in 4hrs with a speed of 60 km/hr. At what speed must it travel to complete the journey in 6 hrs?
The speed of a car is 30% more than that of a bike. Both of them start from a same point. After travelling for 4 hours, the speed of the bike is increas...
A boat goes downstream for 44 km and immediately return. It took the boat twice as long as to make the return trip. If the speed of river flow were twic...
