If the difference between the circumference and diameter of a circle is 60 cm, then the radious of the circle is .

A 7 cm
B 9 cm
C 10 cm
D 14 cm

Correct Answer: 7 cm

ATQ, 2λr - 2r = 60⇒2r (λ - 1) = 60⇒r = 602(λ - 1) = 30227 - 1 = 3022 - 77 = 3015×7.'. r  = 14 cm 
Bissoy MCQ
#পিএসসি ও অন্যান্য নিয়োগ পরীক্ষা #গণিত #বৃত্ত (Circle) #পল্লী কর্ম সহায়ক ফাউন্ডেশন সহকারী ব্যবস্থাপক ০২. ০৮.২০১৯

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