Question

274. If the length and breadth of a rectangle are doubled, how does its perimeter change?​

Answer 1

Answer:

it gets doubled

Step-by-step explanation:

perimeter of rectangle

2(l+b)

after doubling length and breadth

perimeter of new rectangle

2(2l+2b)

=4l+4b

=4(l+b)

which is 2 times the original perimeter so perimeter gets doubled

Answer 2

Answer:

perimeter=2(l+b)

if l and b doubled - 2l and 2b new l and b respectively

new perimeter= 2(2l+2b)=4(l+b)

new perimeter/old perimeter=4(l+b)/2(l+b)=2:1

Hence the perimeter is doubled if l and b are doubled

Step-by-step explanation:

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