the length of a rectangular wooden board is thrice it's breadth. If the length of the board is 120cm, find the cost of farming it at the rate of rupees 5 for 20 CM.
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Answer:
let the breadth be x....
we are given an condition that
120=3x
so x=120/3=40.....
we got breadth 40cm ...
now we need to find the perimeter of the board ...
perimeter=2(l+b)
=2(l+b)
=2(120+40)
=2(160)
=320cm
so here we are given 5rs per 20cm....
so , cost per meter
=320/20*5
=16*5
=80rupees
so we will need 80 rupees to frame the board
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