Question

Ranveer rx107 bro plz answer this question ​

Answer 1

Answer:

3.9x/100 = 78

x = 7800/3.9

x = 2000

Answer 2

Given−

the radius of semicircle=25cm.

To find out−

the perimeter=C and area=A of the semicircle=?

Solution

We know that

the perimeter of a semicircle=C

=the semicircular arc + the diameter=πr+2r

⟹C=r(π+2)=25(3.14+2)=128.5cm.

Again area×semicircle=A= 21 πr ^2

when r=radius of the circle

⟹A= 21×7×22×25 ^2 cm^ 2

=981.25cm 2

Step-by-step explanation:

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