Question

Kunle tie his mother's wrapper round his waist completely 12times. *If the measurement of his waist has a diameter 3.5cm. Find the length of the wrapper*

Answer 1

Let $L=$ the length of the wrapper, $d=$ the diameter of his waist, and $n=$number of wraps.

Given $d=3.5\ cm, n=12.$

Then

$$L=\pi\cdot d\cdot n=\pi\cdot3.5\ cm\cdot12=42\pi\ cm\approx132\ cm$$

The length of the wrapper 132 cm.