cost of whitewashing a wall at Rs 15 per sq meter is Rs 2040 . if the breath of the wall is 8 m , find its length
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cost of white washing wall=2040
cost for 1m^2=15 rupees
area white washed in 2040 rupees =2040/15
=136 m^2
area of wall=136m^2
area=l×b
136=l×8
l=136/8
l=17 m
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