a class room is 8 metre long 7 metre broad and 4.5 M height in Windows and areas of 19 within the doors and windows at the rate of Rs 12 per metre
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ohhhhhh
sorry,
i don't know
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Answer:
a classroom is in a cuboidal shape.
length = 8 m
breadth = 7m
height=4.5m.
To find the cost of whitewashing the walls. First we have to find out the lateral surface area of cuboid.
Lateral surface area of cuboid = 2h (1 +b )
= 2 x 4.5 (8+7)
= 9 (15)
= 135² m
The cost 1 sq.m is Rs. 2.50
the cost of whitewashing the walls= 2.50 x 135
= Rs. 337.50
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