Multiple choice

It cost Rs $4020$ to paint the inner curved surface area of hemisphere of radius $8 m$. If it is painted at rate of Rs.$10: per: m^2$. Find inner curved surface.

  1. $\displaystyle 402{ m }^{ 2 }$
  2. $\displaystyle 400{ m }^{ 2 }$
  3. $\displaystyle 200{ m }^{ 2 }$
  4. $\displaystyle 201{ m }^{ 2 }$
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A Correct answer
Explanation

Cost = Area * Rate. 4020 = Area * 10. Area = 402 m^2.

AI explanation

Divide the total painting cost by the rate per square meter to find the inner curved surface area. The calculation is 4020 divided by 10, which results in 402 square meters.

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