Paper charge is Rs. 60 per kg. How much expenditure would be there to cover a cube of edge 10m with a paper, if one kg of paper covers 20 sq.m. area?	Pick:
A) Rs. 2250
B) Rs. 3600
C) Rs. 2700
D) Rs. 1800
E) None of these
Explanation:   Total surface area of the cube =6x(10)2=600sq.m   1kg covers 20sq.m area,for 600 we need=600/20= 
<gadget id="calculator">600/20</gadget>
<output>30</output>
30kg paper.   Expenditure=rate x quantity=Rs.60x30kg=Rs.1800   ANSWER IS Rs. 1800
<result>D</result>
Paper charge is Rs. 60 per kg. How much expenditure would be there to cover a cube of edge 10m with a paper, if one kg of paper covers 20 sq.m. area?