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Question

The lateral surface area of a cuboid is 300 sq.cm the ratio of Length, breadth and height are in the ratio 4:2:1 find the Length, breadth and height of the cubiod

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Solution

Let the length , breadth and height of a cuboid be 4x,2x and x respectively.
Lateral Surface area of the cuboid=2(bh+lh)
300=2(b+l)h
300=2(2x+4x)x
12x2=300
x2=30012=25
x=5cm
Hence length=4x=4×5=20cm, Breadth=2x=2×5=10cm and height=x=5cm


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