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How many degrees does the hour hand of a clock turn in 5 minutes?
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Answer 1 · 2017-03-07T15:44:08

Area swept by minute hand: #(7pi)/4# sq.cm.

I have assumed underoot 21 means #sqrt(21)#

The surface area of the clock when the minute hand makes 1 full rotation is
#"Area"_circle = pir^2 =pi(sqrt(21))^2=21pi#

During the interval from 7:00 to 7:05, the minute hand sweeps #1/12# of its full surface area.

#"Area"_"swept 7:00 to 7:05"=1/12xx21pi = (7pi)/4#