Discussion of Question with ID = 026 under Clocks-and-Calendars

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Question

How many degrees does a minute hand sweep in 20 minutes?

A

120°.

B

130°.

C

110°.

D

135°.

Soln.
Ans: a

In 60 mins the angle is 360°. So in 1 min it will sweep by 360/60 = 6°. Therefore in 20 mins it will sweep by 6 x 20 = 120°


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