Question

Samriddhi bent a rope to form a circle. If she got the circumference of the circle is 30 cm more than its diameter. What was the length of the radius?

Do every process step by step. Give me every step like doing in copy and all please

Answer 1

The answer for the radius is 7cm

Explanation:

C=30cm+dcm

d=?

C=πd

30+d=22/7×d

30+d=22d/7

cross multiply

7(30+d)=22d

210+7d=22d

Collect like terms(C.L.T.)

22d-7d=210

15d=210

divide both sides by 15

15d/15=210/15

d=14cm

radius =Diameter/2

r=14/2

r=14cm