Question

A cyclist covers a distance of 800 meter in 4 minutes 20 seconds. what is the speed km/hr of the cyclist?​

Answer 1

Answer:

The cyclist covers 800 m in 4.33 minutes.

So in 1 hour he covers 800*60/(4.33*1000) = 11.08 km.

So his speed is 11.08 kmph.

Answer 2

Given,

The cyclist covers a total of 800 meters in 4 minutes 20 seconds.

To Find,

The speed of the cyclist in km/hour.

Solution,

We know that 800 meters = $\frac{800}{1000}$=$\frac{4}{5}$ km.

And 4 minutes 20 seconds = 4$\frac{20}{60}$=$\frac{13}{3}$ min.

So the cyclist covers a total in $\frac{13}{3}$ min total area of $\frac{4}{5}$ km.

So in 1min, he covers a total of $\frac{\frac{4}{5} }{\frac{13}{3} }$ Km.

So in 60 min, he covers a total of  $\frac{\frac{4}{5} }{\frac{13}{3} }$×60 =$\frac{144}{13}$

Hence, The speed of the cyclist is $\frac{144}{13}$km/hour.