71. Let C, C1, C2 be circles of radii 5,3,2 respectively. C1 and C2 touch each other externally and C internally. A circle C3 touches C1 and C2 externally and C internally. If its radius is m/n, where m and n are relatively prime integers, then 2n-m is?

71. Let C, C1, C2 be circles of radii 5,3,2 respectively. C1 and C2 to

1.	71. Let C, C1, C2 be circles of radii 5,3,2 respectively. C1 and C2 touch each other externally and C internally. A circle C3 touches C1 and C2 externally and C internally. If its radius is m/n, where m and n are relatively prime integers, then 2n-m is?
Answer» 71. Let C, C1, C2 be circles of radii 5,3,2 respectively. C1 and C2 touch each other externally and C internally. A circle C3 touches C1 and C2 externally and C internally. If its radius is m/n, where m and n are relatively prime integers, then 2n-m is?