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If length and breadth of a rectangle is doubled, what happens to its perimeter?

Answer 1

Savannah Aguilar

If length and breadth of a rectangle are doubled then its perimeter too is doubled.

Perimeter of a rectangle whose length is #l# and breadth is #b# is

#2xx(l+b)#

If length and breadth are doubled, they become #2l# and #2b# and perimeter becomes

#2xx(2l+2b)=2xx2(l+b)=4(l+b)#

i.e. perimeter is doubled.

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Answer 2

Autumn Armstrong

If the length and breadth of a rectangle are doubled, the perimeter of the rectangle also doubles.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.