A steel box has dimensions of 3 m, 2 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 ______.
₹ 1700
Given,
l=3 m, b=2 m and h=0.5 m
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 of gold plating costs ₹100.
So, total cost
=₹100×17
=₹1700