Question

A person travels on the boundary of a circular park of radius 7 (m) in 2 sec. What is the speed of person in m/sec?

Answer 1

$\huge\fcolorbox{red}{yellow}{Answer}$

22 m/s

Explanation:

First Lets Calculate The Distance Travelled :-

Distance Travelled = Circumference Of Circle

Circumference :-

$\fbox\color{orange}{Circumference=2 \: π \: r}$

Lets Put The Values :-

$=> 2\times \frac{22}{7} \times 7 \\ => 22 \times 2 \\ => \boxed{44 m}$

Thus The Distance Travelled Is 44 m

Now Lets Calculate the speed :-

• Distance Travelled = 44 m
• Time Taken = 2 sec
• Speed = ?

Formula

$\color{blue}{Speed = \frac{Distamce}{Time}} </p><p>$

Lets Put the Values :-

$=> \frac{44}{2} \\ => \boxed{ 22}$

Hope it helped