Q9 of 64 Page 77

A container of side 3.5m is to be painted both inside and outside. Find the area to be painted and the total cost of painting it at the rate of ₹75 per square meter.

Given:

side of container (a) = 3.5cm


Area of cubical box to be painted both sides = 12a2


= 12(3.5)2


⇒ Area of cubical box to be painted both sides = 147m2


total cost of painting it at the rate of Rs75 per square meter


then total cost of painting painted box = 147 × 75 = Rs11025


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