Question

the hour hand of a clock is 20cm long. what amount of area does it pass over in 3 hours?

Answer 1

Step-by-step explanation:

456 is a right answers I am not surre

Answer 2

Answer:

consider this what time is it when you go ahead from 12 to 3 hours after, its 3 o clock right and after 3 o clock you go 3 hours after you get 6 correct ? right. meaning in 3 hours you complete quarter of a circle

the area of a circle is pi x r^2 ,r being the radius in this case is equal to the length of the hour hand so the required area is

1/4 x ( pi x r^2)

1/4 x ( pi x 20^2)

=100 pi cm^2

or 314 cm^2

Step-by-step explanation:

this may help you friend