What is the area swept by the minute hand of a clock between 7/15 and 7/50 if its length is 10.5 cm?

10.

A well of diameters 3m is dug 14m deep. The Earth taken out of it has been spread evenly all around it in the shape of a circular ring of width 4m to form an embankment. Find the height of the embankment.

• 4.25 m

• 2.250 m

• 1.125 m

• 1.125 m

D.

1.125 m

Let, height of embankment  = h m
Given, radius of well  =