1.

A room is 16 m long ,7 m broadand 8 m high. Find the cost of white washing the four walls of room at Rs. 7.5 per m^(2), white washing is notto be done on the doors and windows , which occupy 65 m^2.

Answer»

SOLUTION :Area of 4 walls of a ROOM`=2(16+7)xx8=368m^2`
Nt area of 4 walls`=368-65=303m^2`
thereforeCost of white washing =` 303xx7.5=₹2272.5`


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