Question

find the surface area of a straw of diameter 9.1mm and height 6 cm
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Answer 1

Step-by-step explanation:

Daimeter of straw =9.1mm

radius =9.1/20 =45.5cm (since, 1cm=10mm)

and then, height =6cm.

Now, surface area of a straw =2πr(h+r) sq units

==2×22/7 × 45.5(6+45.5)

==44×6.5×51.5

=14729 cm^2.

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Answer 2

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