4. The total surface area of a cylinder is 264 m². Find its volume if its height is 5 times its radius.(Answer =110√7)
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Answer:
110√7 cubic meters
Step-by-step explanation:
Given h = 5r
We know,
The total surface area of a cylinder
= 2πr(h + r)
According to the Condition,
2πr(h + r) = 264
or, 2×22/7×r×(5r+r) = 264
or, 6r^2 = (264×7) / (22×2)
or, r^2 = 7
or, r = √7
We know that the volume of a cylinder is
V= πr^2h
= 22/7 × ( 7×5×√7 )
= 22×5×√7
= 110√7
Therefore, the volume of the cylinder is 110√7 cubic meters.
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