The cost of the paint is rs.40 per kg. if 1kg of paint covers 20 sq.ft, how much will it cost to paint outside of a cube having 30 feet each side	Choose the correct choice from the following choices.
A) Rs.962
B) Rs.672
C) Rs.546
D) Rs.10800
E) None of these
Explanation:   surface area of a cube= 6 x 30^2 = 5400 sq.ft   quantity of paint required=(5400/20)= 
<gadget id="calculator">(5400/20)</gadget>
<output>270</output>
270 kg   cost of painting= 40 x 270 = Rs.10800   Answer: Rs.10800
<result>D</result>
The cost of the paint is rs.40 per kg. if 1kg of paint covers 20 sq.ft, how much will it cost to paint outside of a cube having 30 feet each side