Question

area of a rectangle is 2400 sq cm if the length and breadth are in the ratio 8:3 find the length and breadth if length and breadth are increased by 20 cm then find the ratio between length and breadth



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Answer 1

Answer:

let

A=area of rectangle

x= length and y=breadth

A=2400M2, X/Y=3:2

3y=2x

y=1.5x

A=XY , A= (x)(1.5x)

1.5x2=2400, x2=1600, x=40cm

therefore , the length of rectangle is 40cm

Answer 2

Answer:

L=80cm,B=30cm

Ratio of new length and breadth

Step-by-step explanation:

Let ratio be x

l=8x , b=3x

Area=2400cm

Area=l*b

l*b=2400

8x*3x=2400

24x^2=2400

x=10cm

So, l=80cm and b=30cm

If sides are increased by 20cm

l=100cm , b=50cm

New ratio = 100/50

                =2:1

Hope it helps you

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