Question

A rectangle aluminium plate of 44 cm in to 20 cm is rolled in to a hollow cylinder. Find out the volume of the hollow cylinder

Answer 1

here heighth(h)= 20cm
circumference = 2pie r
44= 2pie r
r =22/pie = 22/(22÷7) =7cm
volume of cylinder= pie(r^2)h
= pie×7^2 ×20
=(22/7)×7×7×20
=22×7×20
=3080 cm^3