Question

A runner ran a 400 m race in 1 min 35 sec. Calculate his average speed in m/sec.

Answer 1

4.21 m / sec.

Explanation:

1 min 35 sec.

= 60 + 35

= 95 sec.

So average speed = 400/95

= 4.21 m / sec.

Answer 2

Explanation:

distance = 400m

time taken = 1 min 35 sec = 95 sec

average speed = 400m / 95 sec = 4=2105 m/ sec