Question

The minute hand
of a clock is
under root 21 cm long. Find the area described
by the minute hand on
the face of clock between 7 am &7:05am.
​

Answer 1

The total area of the clock :

Area = πr²

Area = π (√21)² = 21π cm²

The area described by the minute hand between 7:00 am and 7:05 am :

Area = 5 / 60 x 21 π

Area = 1.75 π

Area = 5.5 cm².

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