the cost of painting a rectangular wall at 30 per metre square is 1800.find the perimetre of the wall if it is known that the height of the wall is 4m.
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4 x L x 30 = 1800
L = 1800 / 4 x 30
L = 15m
L = 1800 / 4 x 30
L = 15m
nwdbittu234p5uo3f:
plz explain it
total area of rectangle = L x B = L x 4
rs 30 per square meter... ie 4L x 30 = 1800
but here height is given not breadth
this question is based on 2 dimensions so here height is the breadth
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