Question

An athlete runs 200 metres race in 24 seconds. What is his speed in kmph

Answer 1

distance travelled by him =200m
time taken =24sec
speed=distance/time
=200/24m/sec

speed = 8.34 m/s ×18/5= 30.024 km/hr

Answer 2

Distance travelled

Distance = 200 m

               = 200/1000 km

               = 1/5 km

               = 0.2 km

Time taken

Time = 24 s

        = 24  / 60 min

        = 4 / 10 min

        = 0.4 min

        = 0.4 / 60 hr

       

Now speed

Speed = distance/time

           = 0.2 km / ( 0.4 / 60 hr )

           = 0.2 km × 60  / 0.4 hr

           = 60 km / 2 hr

           = 30 km/hr

ANSWER;

The speed is 30 km/hr