• Numerical Ability - Mensuration
Question

A tank is 25 m long, 12 m wide and 6 m deep. The cost of plastering its walls and bottom at 25paise per sq. m, is:

  • A) 212
  • B) 195
  • C) 186
  • D) 174
  • E) None of the Above
Solution

Answer – C.186
Explanation :
Area to be plastered = [2(l + b) x h] + (l x b)
Area= {[2(25 + 12) x 6] + (25 x 12)} = 744 m2
Cost of plastering = 744 * 25/100 = 186

Answer – C.186
Explanation :
Area to be plastered = [2(l + b) x h] + (l x b)
Area= {[2(25 + 12) x 6] + (25 x 12)} = 744 m2
Cost of plastering = 744 * 25/100 = 186
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