a train travels from a to b at the rate 20 km/hr and from b to a at the rate 30 km/hr, what is the average speed
Answers
Answer:
Aditya left his house at 9.20 a.m. and travelled at 75 km/hr. His brother left later and travelled along the
same rded at 90 km/hr. They both arrived at the same destination at 3 : 20p.m. At what time did Aditya's
brother leave home?
14. Meenu drives her car for 11
hours with a constant speed of 66 km/hr and then for another 45 minutes
with a constant speed of 80 km/hr. What was her average speed?
15. An aeroplane travels distances of 2500 km, 1200 km and 500 km at the rate of 500 km/hr.
400 km/hr and 250 km/h respectively. Find the average speed of the plane.
16. For a race Manish ran at a speed of 6 m/s for 10 seconds. He ran a further 40 m at a speed of 8 m/s.
What is his average speed for the race in km/h?
17. Rachit took 4 hours to complete the last
4
part of a journey at an average speed of 55 km/hr. His average
speed for the whole journey is 60 km/hr. How long will it take to cover the first part of the journey?
4
18. A train 280 m long is moving at a speed of 60 km/hr. What is the time taken by it to
cross a platform 220 m long?
19. A train is running at a speed of 90 km/hr. If it crosses a signal in 10 seconds. Find
the length of the train in metres.
20. A train 150 m long passes a tree in 12 seconds. How long will it take to pass a tunnel 250 m long?
Multiple Choice Questions (MCQs)
Tick (✓) the correct option.
21. Which of the following is the slowest speed?
3
(a) 6
6-km/hr
1
(b) 90 m/min
(c) km/min
(d) 3 km/sec
22. A car takes 30 minutes to travel from town A to town B if it travels at a speed of
50 km/hr. If its speed is increased by 20%, how long will it take to travel from
town A to town B?
(a) 10 min
(b) 20 min
(c) 25 min
(d) 15 min
Answer:
24km/hr...hope this will help u..
