Question

Reena jogs around a semicircular-shaped lawn with diameter of $4.2km$ daily. How much distance does she jog every day?

Answer 1

Reena is jogging around a semi-circular field i.e, She is covering the

circumference (semi-circle).

Let $d$ be the diameter of the semi-circle and $r$ be the radius.

$\therefore circumference=\pi r+d$

$=(3.14\times 2.1+4.2)km$

$=10.8km$

Hence, she (Reena jogs around $10.8km$ daily.)