Question

The perimeter of a semi circular metallic plate is 86.4 cm . Calculate the radius and area of the plate

Answer 1

Perimeter of semicircle = πR

πR = 86.4

R = 86.4/3.14

R = 21.51 cm

hope it helped you

Answer 2

Answer:

PARAMETER OF A SEMI CIRCULAR PATH IS EQUAL TO 86.4 CM

LET THE RADIUS BE R

*pie r +2r=86.4cm (pie value =22/7)

22/7r+2r=86.4cm

(22/7+2)r=86.4cm

16.8 perimeter we got

Now,

AREA OF THE CIRCLE

*pie r2(r is square)

22/7+16.8×16.8

443.52cm2 answer

I didn't got pie sign thatswhy i mentioned *pie

I hope it will help you

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