Question

Himanshu starts from his home at 8:00 AM and reaches office by 9:00 AM. His office is $25km$ away from his house. What is his actual speed at 8:45 AM?

• A. $25km{h}^{-1}$
• B. More than $25km{h}^{-1}$
• C. Less than $25km{h}^{-1}$
• D. Cannot be determined

Answer 1

The correct option is D

Cannot be determined

We know that

$Speed=\frac{Distancecovered}{Timetaken}$

Here, the time taken is $1h$ and the distance is $25km$. So the average speed is $25km{h}^{-1}$.

However, the speed at any instant need not be $25km{h}^{-1}$. The formula for speed gives us the average speed in the time interval.