Find the area of the four walls of a room,7 m long, 5 m broad and 3 m high. Find the cost of distempering the walls at the rate of Rupees 3.15 per m^2.

Asked by chauhanayush706 | 8th Jan, 2017, 07:55: AM

Expert Answer:

begin mathsize 16px style Length space of space straight a space room equals 7 space straight m
Breadthnof space straight a space rom equals 5 space straight m
Height space of space straight a space room equals 3 space straight m
Area space of space four space walls space of space straight a space room space means space we space have space to space find space curved space surface space area space of space straight a space room.
Now comma space curved space surface space area equals 2 straight h left parenthesis straight l plus straight b right parenthesis
equals 2 straight x 3 left parenthesis 7 plus 5 right parenthesis
equals 6 space straight x space 12
equals 72 space straight m squared
Cost space of space distempering equals Rs. space 3 comma 15 space divided by space straight m squared
Hence comma space cost space of space distempering space 72 space straight m squared equals Rs. space left parenthesis 3.15 space straight x space 72 right parenthesis space equals Rs. space 226.80 space end style

Answered by Rashmi Khot | 8th Jan, 2017, 05:33: PM

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