Cost to paint outer curved surface of cylindrical pillar $r=0.5, h=4$ m at ₹$10$/m² (use $\pi=22/7$) is

Cost to paint outer curved surface of cylindrical pillar $r=0.5, h=4$ m at ₹$10$/m² (use $\pi=22/7$) is
  1. approx ₹$125.71$
  2. ₹$200$
  3. ₹$80$
  4. ₹$314$

Solution

CSA $=2(22/7)(0.5)(4)\approx 12.571$; cost $\approx 125.71$.

Asked in: MH-SSC-9

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