Question

Спо р
оппу
9. The hour and minute hards of a clock are 4.2cm and 7cm long respectively. Find the sum
of the distances covered by their tips in 1 day.​

Answer 1

Answer

An hour hand completes 2 rotations in 1 day i.e, in 24 hours.

Therefore, distance covered by the hour hand in 1 day = 2×circumference=2×2πr

=2×2×

7

22

×4.2 cm

=52.8 cm

Minute hand completes 24 rotations in 1 day.

Therefore, distance covered by the minute hand in 1 day

=24×circumference

=24×2×

7

22

×7=1056 cm

Therefore,

Sum of the distance covered by the tips of two hands =52.8+1056=1108.8 cm

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Answer 2

Answer:

the answer is 288

Step-by-step explanation:

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