Question

A boy runs a 15 km Marathon Race at a speed of 20 m/s. How much time will he take in completing the race?​

Answer 1

Answer:

D = 15km = 15000m

S = 20m/s

T = D/S = 15000/20 = 750 sec . = 12 min 30 sec ..

Answer 2

Answer:

12.5 min

Step-by-step explanation:

A boy runs 15 km

So, distance (d) = 15km

Speed of the boy (s) = 20m/s

Now, converting 20m/s into km/hr

=> 20*3.6

=> 72 km/hr

As we know

Time (T) = D/S

$= > 15 \div 72$

0.20833 hour

or

12.5 min