A rectangular sheet of dimension 20cm*7cm is rotated about its longer side find the volume and the total surface area of the solid thus generated. please solve it
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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
PLEASE MAKE ME BRAINLIST
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