ex 13.3 que 1 ncert book class 9 plz solve
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Answer: It is given that
Length of box = 1.5m
Breadth of box = 1.25m
Depth of box. = 0.65m
( I) Area of sheet required= 2lh + 2bh + lb
= [ 2*1.5*0.65+2*1.25*0.65+1.5*1.25]m^2
= 5.45m^2
Cost of sheet per m^2 area = ₹20
Cost of sheet of 5.45m^2 area = ₹(5.45*20)
=₹109
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