The length of the minute hand of a clock is 7 cm, then how much distance does it cover in one hour?
Answers
Answered by
5
the length of the minute hand will be the radius of the sector are which it will sweep
so in 60 minutes it sweeps 360°
therefore
by area of sector,
360/360× π(7)²
=π(7)²
=153.86cm2
Answered by
2
Step-by-step explanation:
radius= 7cm
circumference = 2πr
= 2(22/7)×7cm
= 44cm
thus the distance covered by the hand in 1 min = 44cm
therefore distance covered in 1 hr = 60×44cm
= 2640cm or 26.4m
edit(sorry read the question wrong)
angle swept by the minute hand in 60 min
= 360/60×60 = 360
area swept = ∅/360πr² = 360/360πr²
= (22/7)×7cm×7cm
= 154cm²
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