Question

2.

Answer 1

the answer is 154/3cm^2

Answer 2

Answer:

Area swept by minute hand of 14 cm in 5 minutes = 51.33 $\mathrm{cm}^{2}$

Solution:

Given that length of the minute hand = 14 cm

Need to calculate the area swept by minute hand in 5 minutes.

As in 1 hour , that is 60 minutes , minute hand completes a circle .

So area swept by minute hand of 14 cm in 60 minutes = area of circle of radius 14 cm

As area of circle = $\pi r^{2}$

where r is radius

So area swept by given minute hand in 60 minutes = $\pi \times 14^{2}=\frac{22}{7} \times 14 \times 14=616$

So area swept by given minute hand in 1 minute = $\frac{616}{60}$

And area swept by given minute hand in 5 minute = $\frac{616}{60} \times 5=51.33$

Hence area swept by minute hand of 14 cm in 5 minutes is 51.33 $\mathrm{cm}^{2}$