Question

The length of second hand of a wall clock is 7 cm Find the area swept by second hand in 1 hour.​

Answer 1

Answer:

153.86 sq.cm

Step-by-step explanation:

60 minutes = 360°

Since 60 minutes = 1 hour

So, 1 hour = 360°

Now we are given that The length of the minute hand of a clock is 7 cm

Area of sector = \frac{\theta}{360^{\circ}} \times \pi r^2

360

∘

θ

×πr

2

= \frac{360}{360}\times 3.14 \times (7)^2

360

360

×3.14×(7)

2

= 3.14 \times (7)^23.14×(7)

2

= 153.86 cm^2153.86cm

2

Hence the area swept by minute hand in 1 hour is 153.86 sq.cm.

Answer 2

Answer: 77cm2

Solution