In a house a hall is 20 m long, 15m wide and 5m high. Its interior has to be covered with mat. What will be the total expenditure if it costs Rs. 60 per square m? Select the correct option.
A) Rs.43000
B) Rs.50000
C) Rs.57000
D) Rs.60000
E) Rs.62000
Length (l) = 20 m, Breadth (b) = 15 m and Height (h) = 5 m   Total area of the hall to be covered with mat = 2(lb + bh + hl)   = 2(20 * 15 + 15 * 5 + 5 * 20)   =2(300 + 75 + 100)   = 2 * 475= 
<gadget id="calculator">2 * 475</gadget>
<output>950</output>
950 sq. m   Total expenditure= 60 * 950   = Rs.57000   Rs.57000
<result>C</result>
In a house a hall is 20 m long, 15m wide and 5m high. Its interior has to be covered with mat. What will be the total expenditure if it costs Rs. 60 per square m?