Volume and Surface Area Questions Answers

Volume and Surface Area Questions Answers (MCQ) listings with explanations includes questions on Cubiod, Cube, Cylinder, Cone, Sphere, Hemisphere etc which are important for competitive exams like SSC, BANK PO, Clerk, IBPS, SBI-PO, RBI, MBA, MAT, CAT, IIFT, IGNOU, SSC CGL, CBI, CPO, CLAT, CTET, NDA, CDS, Specialist Officers.

21) The cost of the paint is Rs. 36.50 per kg. If 1 kg of paint covers 16 square feet, how much will it cost to paint outside of a cube having 8 feet each side

  • 1) Rs. 850
  • 2) Rs. 860
  • 3) Rs. 876
  • 4) Rs. 886
View Answer View Explanation
Ans.   C
Explanation :
We will first calculate the Surface area of cube, then we will calculate the quantity of paint required to get answer. Here we go, \begin{aligned} \text{Surface area =}6a^2 \= 6 * 8^2 = 384 \text{sq feet} \\text{Quantity required =}\frac{384}{16} \= 24 kg\\text{Cost of painting =} 36.50*24 \= Rs. 876 \end{aligned}
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