Simplification - General Aptitude

Q1:

A sum of Rs. 1360 has been divided among A, B and C such that A gets  of what B gets and B gets  of what C gets. B's share is:

A Rs. 120

B Rs. 160

C Rs. 240

D Rs. 300

ANS:C - Rs. 240

Let C's share = Rs. x

Then, B's share = Rs. x ,   A's share = Rs. 2 x x = Rs. x
4 3 4 6
x + x x = 1360
6 4
17x = 1360
12
 x = 1360 x 12 = Rs. 960
17
Hence, B's share = Rs. 960 = Rs. 240.
4