Question

दो संकेंद्रीय वृतों के व्यास क्रमशः 8cm औऱ 10 cm है। इनके बीच की दूरी क्या होगी?

Answer 1

See figure two concentric circle whose radii are ' OB' and ' OA' .

OB = 4 cm
OA = 5 cm

distance between two circles = OA - OB
= AB = ( 5 - 4) cm = 1 cm