Question

Mukesh walks around a circular field of radius 14 metres at a speed of 4 kilometres per hour. If he takes 20 rounds.For how long he has to walk?​

Answer 1

Step-by-step explanation:

4km= 4000m

14m r

20round

4000M/ 60minut

4000÷60= 66.6m/minut

Area of circle=

$\frac{1}{2} \times \pi \:r {}^{2}$

$\pi = 3.14$

$\frac{1}{2} \times 3.14 \times 14 {}^{2} = 1.12 \times 196 = \\ 219.52m$

219.52m / round

219.52×20=4390.4 m