Question

Area of a rectangle is 2400 sq.cm. If length and breadth are in the ratio 8 : 3, find length and breadth? If length and breadth are increased by 20 cm, then find the ratio between length and breadth

Answer 1

Length = 8x

Breadth = 3x

\(8x\times3x=2400,\)

\(24x^2=2400\)

\(x^2=\frac{2400}{24}=100;\)

\(x^2=\sqrt{100}=10\)

length = 8 × 10 = 80,

Breadth = 3 × 10 = 30

When length and breadth are increased by 20, then length = 100;

Breadth = 50

length : breadth = 2 : 1