Math, asked by AMK23, 1 month ago

30cm is increased by 5%
20cm is increased by 10%
Find the the percentage increase of the perimeter of the rectangle.

Answers

Answered by tripathiharshmani
0

Answer:

old perimeter = 30*20= 600 sq.cm

new length = 30+ 5% of 30 = 31.5

new width = 20+ 10% of 20 = 22

so,new perimeter = 31.5*22 = 693

Now,% increase

= (693-600/600)*100 = 15.5%

Answered by sauravpanwar98
0

Answer:

5% of 30 is 1.5, so it become 31.5

10% of 20 is 2, so it increased 22

normal perimeter = 2(30+20)= 100

perimeter after increasing= 2(31.5+22)= 107

so, increase in perimeter= 7%

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