Question

Ramesh could run a 100-m race in 20 second after training he can finish the race in 15 second by how much Has he improve his speed.​

Answer 1

It is given that the time taken by Ramesh to run a 100m race is 20 seconds. ⇒ v1 = 5m/s. So, the speed before the training is 5m/s. It is given that the time taken by Ramesh to complete the race after the training is 15 seconds.

Answer 2

Answer:

Ramesh's speed before training = d/t

=

20

100

=5m/s

Ramesh's speed after training = d/t

=

15

100

=6.66m/s

So, his speed increased by = 6.66−5=1.66 m/s