Question

if the wheel is 14 cm then the number of revolution to cover the distance of 1056 cm is?
the perimeter of a semi circle is 144cm the radius is?

Answer 1

Answer:

Explanation:

perimeter,

= 2.π.r,

= 2*22/7*14,

= 88 cm ,

revolutions to cover 1056,

= 1056/88,

= 12 revolutions.

The perimeter of semicircle is 144 cm,which is equal to 2r + (π)r,

where r= radius.

2r + (π)r,

= r(14+22)/7,

= r(36/7),

so r = 144*7/36,

= 28 cm.

Hope it helps you.