Question

if the length and breadth of a rectangle are doubled by what percentage is the area increase​

Answer 1

Answer:

4times increases.

Step-by-step explanation:

l=2length

b=2breadth

area=( l* b)=(2l*2b)=4lb.

Answer 2

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Let us consider the initial length as l

Let us consider the initial breadth as b

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The area = lb

Now, the new length = 2l( Because it is said that the length is doubled)

Similarly, the new breadth = 2b

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The new area = 2l X 2b

                         = 4lb

Now, the percentage increase can be calculated using this formula,

(3lb/lb X 100)%

= 300 %

Therefore, your answer will be 300%