Question

A rectangular sheet of dimensions 44 cm x 7 cm is rotated about its longer side.
Find the volume and the total surface area of the solid thus generated. please tell the volume and the area where 44 is the length and 7 is the breadth

Answer 1

Answer:

When a rectangular sheet is rotated about its length, we get a cylinder

where the height of cylinder =7 cm

and the circumference of the base of the cylinder =25 cm

Thus curved surface area =2πrh

=(2πr)×h

=25×7

=175 cm

2