Question

Mark (✓) against the correct answer
On increasing the salary of a man by 25%, it becomes Rs 20000. What was his original salary?

(a) Rs 15000
(b) Rs 16000
(c) Rs 18000
(d) Rs 25000

Answer 1

(b) Rs. 16000
Let us assume that the original salary of the man is Rs x.
Increase in it = 25%
Value increased in the salary = 25% of Rs. x
= Rs $\left(\frac{25}{100}\times x\right)$ = Rs $\left(\frac{x}{4}\right)$
Salary after increment= Rs $\left(x+\frac{x}{4}\right)$ = Rs $\left(\frac{5x}{4}\right)$
However, increased salary = Rs 20000
Then, Rs $\left(\frac{5x}{4}\right)$ = Rs 20000
∴ x = Rs $\left(\frac{20000\times 4}{5}\right)$ = Rs 16000
Hence, the original salary of the man is Rs 16,000