Question

If the area of rectangle is increased by 13% and its breadth is increased by 5%, then
what is the percentage increase in its length? (Approximately)​

Answer 1

Answer:

percentage increase in length is 7.6%

Answer 2

Answer:

7.61%

Step-by-step explanation:

we know that,

area of rectangle=l*b

area of rectangle is increased by 13%

increase in area =100+13%of100=100+13 =113

length is increased by x%=(1+x/100)l

breadth is increased by 5%=(1+5/100)b

(113/100)area of rectangle=(1+x/100)l *(1+5/100)

113/100*l*b=100+x/100*21/20*l*b

113*20=100+x*21

113*20/21=100+x

2260/21-100=x

2260-2100/21=x

160/21=x

x=7.61(Approximately)​