The ratio of A's and B's salary is 6 : 7, If B's salary is increased by 5 1/2, then his total salary becomes Rs 1,47,700. - SSC STUDY

The ratio of A’s and B’s salary is 6 : 7, If B’s salary is increased by $5\frac12$ , then his total salary becomes Rs 1,47,700. The salary (in Rs) of A is :

Options
a) 1,10,000
b) 1,20,000
c) 1,40,000
d) 1,35,000

Solution

As per question
Ratio of salary A and B = 6x : 7x

If B’s salary is increased by $5\frac12$ , then his total salary becomes Rs 1,47,700
B’s salary increased by (11/2)% = $7x \times \frac {(11/2)}{100)} =147700$
$3.5x \times .11$ = 147700
7.385x = 147700
x = 20000 Rs.
A’s salary = 6 x 20000 = 120000

Ans: b) 1,20,000