Question

2. Express each of the following in km/hour :

(a) 20 m/sec.
(b) 50/3 m/sec. (c) 15 m/sec. (d) 14.5 m/sec.
3. A train travels at a speed of 20 metres/second. What is its speed in km/hour?
4. The speed of a car is 63 km per hour. Find its speed in metres per second.​

Answer 1

Answer:

2.(a) 20×18/5= 72 km/hour

(b) 50/3×18/5= 60 km/hour

(c) 15×18/5= 54 km/hour

(d) 14.5×18/5= 52.2 km/hour

3. Speed of train in km/hour =20×18/5=72km/hour

4. Speed of a car in metres per second =63×5/18=22.5m/sec