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given-lateral surface area of a brick = 480 cm^2
length = 20cm , height = 8cm
to find - breadth
let, breadth = x
lateral surface area of a cuboid = 2(l+b)h
480 = 2 (20 + x ) × 8
480/2 = (20+X )× 8
240 /8 = (20+x)
30 = 20+x
30-20 = x
10 = x
breadth = x = 10cm
length = 20cm , height = 8cm
to find - breadth
let, breadth = x
lateral surface area of a cuboid = 2(l+b)h
480 = 2 (20 + x ) × 8
480/2 = (20+X )× 8
240 /8 = (20+x)
30 = 20+x
30-20 = x
10 = x
breadth = x = 10cm
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