Answer:
The time for the entire race is 11.39 sec.
Explanation:
Given that,
Distance = 15 m
Remainder distance = 100 m
Suppose A sprinter begins a race with an acceleration of 3.4 m/s².
We need to calculate the time
Using equation of motion

Put the value in the equation



We need to calculate the final velocity of sprinter
Using equation of motion again

Put the value into the formula


We need to calculate the distance covers by sprinter

The sprinter need to covers only 85 m.
We need to calculate the time
Using formula of time

Put the value into the formula


We need to calculate the time for the entire race

Put the value into the formula


Hence, The time for the entire race is 11.39 sec.