The monthly salaries of A, B and C are in the ratio 2 : 3 : 5. If C's monthly salary is Rs. 12000 more than that of A, then B's annual salary is = ?

a) Rs. 120000
b) Rs. 144000
c) Rs. 180000
d) Rs. 240000

Answer: b
Explanation:

C – A = 12000
5x – 2x = 12000
3x = 12000
x = 4000
Monthly salary of B is = 3x = Rs. 12000
Annual salary of B is = 12 × 1200
= Rs. 144000

The monthly salaries of A, B and C are in the ratio 2 : 3 : 5. If C’s monthly salary is Rs. 12000 more than that of A, then B’s annual salary is = ?