Question

A train travel 400m in 10 seconds.find its speed in meters pet second and kilometres per hour.

Answer 1

Explanation:

Speed=distance ÷ time

• =400÷10
• =40ms(inverse)

40*5÷18=20*5÷9

• 100÷9=11. 11kmh(inverse)

Answer 2

Explanation:

distance,D = 400m

time,T. = 10sec.

speed,S. = ?

S = D/T

= 400/10

S = 40m/s

Speed in km/h =40×18/5

= 144 km/h