Question

(iv) 225 km/h
(iii) 126 km/h
(iii) 65 m/s
(iv) 80 m/s
Exercise 10A
1. Express each of the following speeds in m/s.
( 36 km/h
(ii) 50 km/h
2. Express each of the following speeds in km/h.
(1) 18 m/s
(ii) 45 m/s
3. The speed of a car is 15 m/s. How far does it travel in 6 hours?
4. Ayush runs 15.6 km per hour. How many metres does he run in 2 minutes?
5. A bus travels from New Delhi to Jaipur at a speed of 60 km/h for 4 hours 48 minutes. How far is New
Delhi from Jaipur?
6. An arrow can travel at a speed of 648 km/h. How long does the arrow take to travel a distance of
2400 m?
7. The distance around a field is 540 m. Vijay runs around the field 8 times in half an hour. What is his
average speed in m/s?
1
4
8. Tina took 2 hours to travel of the distance between Town A and Town B at an average speed of
3
9
72 km/h. What was Tina's average speed if she took 4 hours 12 minutes to travel from Town A to Town B.
9. Lamp-posts are placed 30 metres apart along a road. How long will a car travelling at 45 km per hour
take to pass 6 lamp-posts, not counting the first of them?
1
10. A motorist travelled of his journey at 60 km/h and completed the remaining 90 km in 1 hours. What
2
2
was his average speed for the whole journey?
11. A truck and a bus started off at 10:30 a.m. from opposite ends of a highway. The truck travelled at a
speed of 40 km/h and the bus travelled at a speed of 54 km/h. If they passed each other at 1:00 p.m.,
what was the length of the highway?
12. A car started from Town P and travelled towards Town Q at 70 km/h. At the same time a van started
3
from Town Q and travelled to Town Pat 60 km/h. After 2- hours, they were 65 km apart, still travelling
4
towards each other.​

Answer 1

Answer:

1.

(i) 10 m/s

(ii) 13.88 m/s

2.

(i) 64.8 km/h

(ii) 162 km/h

3.

21.6 km

4.

520 m

5.

287.98 km

6.

13.33 sec