Question

Question for mod!

A manufacturer of tins uses rectangular tin sheets of size 72 cm x 14 cm for manufacturing cylindrical tins of radius 7 cm and height 14 cm. How much sheet will be wasted?

note :- not need copied answer
need quality answer

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Answer 1

solution:-

Area of a rectangle tin sheet

= 72cm × 14 cm

= 1008 sq.cm

Radius of cylinder = 7 cm

Height of cylinder = 14 cm

Total surface area of a cylinder

= 2πr ( r + h)

$= 2 \times \frac{22}{7} \times 7(7 + 14) {cm}^{2}$

$= 44 \times 21 \: {cm}^{2} = 924 \: {cm}^{2}$

∴ Tin sheet used in manufacturing 1 cylinder

= 924 sq.cm

∴ Wastage from the given rectangular sheet

= ( 1008 - 924 )sq.cm = 84 sq.cm

∴ 84 sq.cm tin sheet will be wasted.