anonymous
  • anonymous
If an edge of a square is increased by 10%,then by how much will its surface area be increased?
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
increasing a certain thing 'to' or 'by' do u understand the differnce in both of them ?????
anonymous
  • anonymous
tell me asap
anonymous
  • anonymous
by

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anonymous
  • anonymous
'by' means certain fraction of total is increased or decreased here in this case it is increased
anonymous
  • anonymous
it means here u hav to increase or add the that fraction (10/100) to the initial edge of square
anonymous
  • anonymous
that is 10/100 = 0.1 (fraction of total )
anonymous
  • anonymous
do u knw the formula of surface area of square?
anonymous
  • anonymous
6(s*s)
anonymous
  • anonymous
only s*s
anonymous
  • anonymous
k gud u knw that
anonymous
  • anonymous
now see let us suppose we hav the edge of sq. initially be 1 ..then by the defination of 'by' that i hav told u above u can add fraction (0.1) to 1 that is nw the final edge length is 1.1
anonymous
  • anonymous
follow till here ?
anonymous
  • anonymous
k
anonymous
  • anonymous
now tell me what is the surface area of sq. with new edge length 1.1????????
anonymous
  • anonymous
m singh plss reply??????????/
anonymous
  • anonymous
wait i m understanding vat u did
ZeHanz
  • ZeHanz
Area of square with edge a is a². Edge of new square is a+10% of a = a + 0.1a = 1.1a. Area of new square is (1.1a)²=1.21a² = a² + 0.21a² = a² + 21% of a². So it is 21 % more.
anonymous
  • anonymous
@ZeHanz PLS. DON'T GIVE DIRECT ANSWER
ZeHanz
  • ZeHanz
@manishsatywali : Just thought you had done enough to explain. Sometimes it is better to write the whole thing down, to show the steps. If I had done this right away, I would agree with you ;)
anonymous
  • anonymous
(1.1a)^2
anonymous
  • anonymous
bt i also encourage the way u deliver that in steps...........gd to see that
anonymous
  • anonymous
i think u both have well explained @manishsatywali and @ZeHanz
anonymous
  • anonymous
now have you got the idea...........i mean u reach the final answer any difficulty with the method??????????
anonymous
  • anonymous
no of course thank u @manishsatywali and @ZeHanz
anonymous
  • anonymous
@ZeHanz .........our combo helped @msingh......it's the best we can make out of openstudy
ZeHanz
  • ZeHanz
@manishsatywali: thank you!

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