Question 28 If the difference between the circumference and the radius of a circle is 37cm , π = 22/7, the circumference (in cm) of the circle is
Given that
Difference between circumference and the radius of a circle is 37cm
Thus,
Circumference β Radius = 37 cm
2πr β r = 37
r (2π β 1) = 37
r Γ (2 Γ ππ/π β 1) = 37
r Γ (44/7 β 1) = 37
r Γ (44 β 7)/7 = 37
r Γ 37/7 = 37
r = 37 Γ 7/37
r = 7 cm
Now,
Circumference of Circle = 2πr
= 2 Γ 22/7 Γ 7
= 2 Γ 22
= 44 cm
So, the correct answer is (b)
Made by
Davneet Singh
Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 12 years. He provides courses for Maths and Science at Teachoo.
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