Question

An athlete ran a 100 m race at a speed of 6.25 m/s. Calculate his speed in km/h.

​

Answer 1

Answer:

The speed in km/hr is 22.5.

Explanation:

The rate at which an object travels over a certain distance is known as speed. A fast-moving object travels quickly and covers a large distance in a short amount of time, whereas a slow-moving object travels slowly and covers a little distance in the same length of time.

Given speed = 6.25 m/s

We know that:

1000 m = 1 km and 1 hr = 60 min = 60 × 60 s

⇒1 m = $\frac{1}{1000}$ km and 1 s = $\frac{1}{3600}$ hr

∴6.25 m/s = $\frac{6.25*\frac{1}{100} }{\frac{1}{3600} }$

                 = 6.25 × $\frac{1}{1000}$ × 3600 = 22.5 km/hr

Therefore speed in km/hr is 22.5.

Answer 2

Given: An athlete ran a 100 m race at a speed of 6.25 m/s.

To Find: Calculate his speed in Km/h?

Solution:

It is given that an athlete ran a 100 m race at a speed of 6.25 m/s and we have to find his speed in Km/h.

Firstly,

Distance=100 m

given speed= 6.25 m/s

Formula used:

Speed in Km/h= speed in m/s × (60×60/1000)  

                        =6.25×(60×60/1000)

                         =22500/1000

                          =22.5 Km/h

Final Answer: His speed in km/h is 22.5 Km/h.