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A pillar 4 m high has a curved surface area of 17.6 sq m. What is its diameter? (Take π = $\frac{22}{7} .$ )

Class 8Surface Area of a CylinderMensuration

A2.8 m
B0.7 m
C1.4 m
D4.4 m

Step-by-Step Solution

2π

r \times 4 = 17.6

→ 2π

r = 4.4

→

r = 4.4 \times 7 \div 44 = 0.7

m, so diameter = 1.4 m. 0.7 m is the radius.

Answer: C) 1.4 m

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