Question

In a painting competition of a school a child made Indian national flag whose perimeter was 50 cm . It's area will be decreased by 6square cm if length is decreased by 3 cm and breadth is increased by 2 cm . Find the dimensions of flag

Answer 1

its length is 15 cm and breadth is 10 cm .

Answer 2

2(l+b)=50 

2l+2b=50

l-3(b+2)=lb-6

lb+2l-3b-6=lb-6

2l-3b=0

2l+2b=50

-   -      -

     -5b=-50

b=10

2l+20=50

2l=30

l=15