Multiple choice

The base radius of a cylinder is 1 2/3 times its height. The cost of painting is CSA at 2 paise/cm2 is Rs. 92.40. The volume of liquid is

  1. 80850 cm3

  2. 80580 cm3

  3. 80508 cm3

  4. none
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Given CSA cost = Rs. 92.40 at 2 paise/cm², CSA area = 9240/2 = 4620 cm². With radius r = 5h/3 (since 1 2/3 = 5/3), CSA = 2πrh = 2π(5h/3)h = (10π/3)h². Solving: h² = 4620 × 3/(10π) ≈ 441, so h ≈ 21 cm and r = 35 cm. Volume = πr²h = π(35)²(21) ≈ 80850 cm³. Option A is correct. Options B and C are digit permutations, D is incorrect.

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