Question

Ramesh could run a 100 m race in 20 second .after training he can finish the race in 15 seconds .by how much has he improved his speed

Answer 1

speed = distance/time
Speed 1 (before training)= 100/20 = 5m/s
Speed 2 (after training) = 100/15 =6.6m/s
Improvement in speed =(6.6-5)m/s=1.6m/s

Answer 2

Answer:

$1\frac{2}{3} m/s$

Step-by-step explanation:

Distance=100m

time=20seconds

speed=Distance/Time

=100/20

=5m/s

After training=100/15

=6.6 or

$1\frac{2}{3} m\s$