8. If we increase the length and breadth of a rectangle three times, by how much will the
perimeter of the rectangle change?
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Step-by-step explanation:
Let original length be l and original breadth be b
1 st case
ORIGINAL PERIMETER
= 2 multiply (l+b)
2nd case
NEW PERIMETER
= 2 multiply (3l + 3b)
= 3 x 2 x (l+b)
=6(l+ b)
hence the perimeter will increase three times itself
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