Question

The length of minute hand of a clock is 21 cm. The area swept by the minute hand in 10 minute is

Answer 1

r = 21
Area swept in 1 minute is 6degrees
Area swept in 10 minutes is 60 degrees
$are a \: = \theta\div 360 \times pi \times{r}^{2}$
$area \: = 60\div360 \: \times (22 \div 7) \times 21 \times 21$
$area = 231 {cm}^{2}$

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Answer 2

Answer:

r = 21

Area swept in 1 minute is 6degrees

Area swept in 10 minutes is 60 degrees

are a \: = \theta\div 360 \times pi \times{r}^{2}area=θ÷360×pi×r

2

area \: = 60\div360 \: \times (22 \div 7) \times 21 \times 21area=60÷360×(22÷7)×21×21

area = 231 {cm}^{2}area=231cm

2