Math, asked by raj42, 1 year ago

the area of semicircular region is 308 square cm.then its perimeter will be

Answers

Answered by qais

area of semi circle = π r² /2
⇒π r² /2 = 308
⇒ r² =616/π
=196
so, radius, r = 14 cm
now perimeter = 2π r/2 = π r
=π ×14
= 44 cm
∴perimeter = 44 cm

sippi: the formula qais used is wrong

sippi: see my answer.......i acn give you clear explanation

qais: oops sorry...perimeter = 44 + 28 = 72 cm

sippi: don't act too smart

qais: ok dude..cool

sippi: i am ofcourse cool

qais: good then :)

sippi: fine edit it soon

raj42: plz guys don't fight. I m now looking for right answer

qais: not getting the edit icon..its bcz u have reported this

Answered by sippi

area of semi circle=π r²/2
=>308=π r²/2
=>308*2/22/7=r²
=>r²=196
=>r=14
we know that,
perimeter of semicircle=π r+2r
   =22/7*14+2*r
   =44+28
   = 72m.

hope this helps you.........pls mark as best

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