Question

HELP QUICK 20 POINTS

Answer 1

Answer:

8%

Step-by-step explanation:

Length = 30 cm

It increases by 10 %

The increase is 30*.10 = 3

New length = old length + increase

                     30+3

                       33 cm

Width =20

It increases  by 5%

The increase is 20 *.05 = 1

New width = old width + increase

                   =20+1

                       21

Old perimeter = 2(l+w) = 2(30+20) = 2(50) = 100

New perimeter = 2(l+2) = 2(33+21) =2(54) = 108

Percent increase = (new - old)/old * 100%

                              = (108-100)/100 * 100%

                               = 8/100*100%

                                =8%