Question

A full rotation is measured as 360°. A dial moves through a third of a rotation. How many degrees does it need to move backwards to reach a fifth of a rotation?

Answer 1

At $3^{rd}$ Rotation Dial moves $= 360\times 3=1080^{\circ}$

At $5^{th}$ Rotation Dial moves $= 360\times 5=1800^{\circ}$

To move backwards to reach a fifth of a rotation Dial must moves-

$=1800-1080=720^{\circ}$