Question

An old man goes for morning walk on a semi-circular track of radius $40m$. If he starts from one end of the track and reaches to other end, the distance covered by the man and his displacement will respectively be

• A. $252m,80m$
• B. $80m,126m$
• C. $80m,252m$
• D. $126m,80m$

Answer 1

The correct option is D $126m,80m$

Distance covered = Length of semi-circular path
$=\pi R$
$=\pi \times 40$
$=126m$

Displacement, AB = Diameter
$=2R$
$=2\times 40$
$=80m$

Final Answer: (𝑎)