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Question
A steel box has dimensions of 2 m, 3 m and 0.5 m. It has to be gold plated through electrolysis. If each square metre of gold plating costs ₹100 , then gold plating the outer surface of the box costs :
A steel box has dimensions of 2 m, 3 m and 0.5 m. It has to be gold plated through electrolysis. If each square metre of gold plating costs ₹100 , then gold plating the outer surface of the box costs :
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Solution
The correct option is B ₹ 1700
Given : l = 3m , b = 2m and h = 0.5m
Total Surface area of cuboid shaped box= 2(lb + bh + lh) = 2(3×2 + 2×0.5 + 3×0.5) = 17 m2
Each sq. metre costs ₹ 100
So, Total cost= ₹100 × 17 = ₹ 1700
₹ 1700
Given : l = 3m , b = 2m and h = 0.5m
Total Surface area of cuboid shaped box= 2(lb + bh + lh) = 2(3×2 + 2×0.5 + 3×0.5) = 17 m2
Each sq. metre costs ₹ 100
So, Total cost= ₹100 × 17 = ₹ 1700
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