Question

Here is a rectangle labelled abcd the length of the rectangle is increased by10% and width 5% how much percent has the perimeter increases by

Answer 1

8%

Explanation:

new length = 110% x 30 = 33cm

new width = 105% x 20 = 21cm

new perimeter = 2(33 + 21) = 108cm

old perimeter = 2(30 + 20) = 100cm

percentage increase = 8/100 x 100% = 8%

Topic: Percentage

If you like to venture further, feel free to check out my insta (learntionary). I'll be constantly posting math tips and notes! Thanks!