Question

A rectangular sheet of paper is folded about its width 15 centimetre .
If the length of the sheet is 22 cm find the volume of the hollow cylinder thus formed

Answer 1

heya...


here is the answer ➖➖➖➖➖➖➖➖➖➖➖➖➖⬇


As mentioned in question that sheet is folded along width wise therfore height of cylinder is 15cm and circumference= 22cm

we know that...

circumference=2πr

15cm = 22/7× 2 × r

15×7/22×2= radius

2.4cm= r

also,

volume of cylinder=πr²h

V= 22/7 × 2.4cm× 2.4 cm× 22cm

= 398.2cm^3

hope it helps you...

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Answer 2

width of rectangular sheet = diameter

radius =15/2

volume of cylinder=2πrh

=2×22/7×15/2×22

=44/7×330/2

=14520/14

=1037.14cm³

HENCE, THE VOLUME OF HOLLOW CYLINDER IS 1037.14cm³