Question

The surface area of a cuboid is 1372 sq. Cm. If its dimension are in the ratio of 4:2:1 , then its length is?

Answer 1

Let, Length= 4x , Breadth= 2x, Height= x cm.

ATQ,

2(8 x^ 2 + 2x^ 2 + 4x^2)= 1372

or, 2 × 14x^2 = 1372

or, x^2= 1372÷ 28

or,x= 7

So, Length= 28 cm