Mensuration Practice Test 9

Question : 34 of 40

Marks: +1, -0

Find the curved surface area of a hollow cylinder on the top of a hemisphere whose circumference is 628 cm and total height of both is 2 m.

Solution:

Curved surface area of the figure = 2πrh +

2πr^2

= 2π(r × h +

r^2

)
=

2 × 3.14[(100)^2 + (100)^2]

2 × {314}/{100} × 2 × 10000

= 1,25,600

cm^2

= 12.56

m^2

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