" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
Verified answer
R1 : r2 = 2 : 7K1 : K 2 = πd :πd
=πx2(2a) :π x 2(7a)
= 4a : 14a
= 2 : 7