Mathematics
Grade-7
Easy
Question
Determine the area swept by a clock’s minute hand in one-hour. If the length of the minute hand is 10.2 cm.
- 326.6
- 125.8
- 102.65
- 412.3
The correct answer is: 326.6
length of the minute hand is 10.2 cm, basically r is given
and r = 10.2
minute hand run one circle in one hour , we know, so it is easy to find area
Area =
3.14 × 104.04
= 326.6856 square centimeter
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