Question

The internal measures of a cuboidal room are 10m x 8m x 5 m .Find the total cost of white washing all the four walls ,if the cost of white washing is Rs 20 per square metre.

Answer fastly.​

Answer 1

Answer:

LSA = 2(l+b)h

LSA = 2 (10+8) 5

       = 18(10)

       = 180 m2

cost = area * cost per m2

       = 180 * 20

       = Rs 3600

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