Mathematics
A cylindrical can with radius 10 cm and height 20 cm, is kept on a horizontal surface and then filled with water upto 10 cm. The total wetted surface of the can is. (Take π = 3.14)
871 cm2
624 cm2
314 cm2
942 cm2.
Mensuration
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Answer
By formula,
Area of wet surface of cylinder = 2πrh + πr2
Given,
Water is filled upto height 10 cm.
So, wetted surface area of cylinder is :
⇒ 2 × 3.14 × 10 × 10 + 3.14 × 102
⇒ 628 + 314
⇒ 942 cm2.
Hence, Option 4 is the correct option.
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