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

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Answer 1 · 2017-03-03T06:32:44

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.