A room is 15m long, 4m broad and 3m height. Find the cost of white washing its four walls at 50p per m2 ?	Options.
A) 28  B) 57  C) 58  D) 83  E) 73
Explanation:   2 *3(15 + 4) = 114   114 * 1/2 = Rs.57   Answer: Option 57
<result>B</result>
A room is 15m long, 4m broad and 3m height. Find the cost of white washing its four walls at 50p per m2 ?