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On increasing the salary of a man by $25 %$ , it becomes $Rs . 20000$ . What was his original salary?

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Rs . 15000

Rs . 16000

Rs . 18000

Rs . 25000

answer is B.

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Detailed Solution

Given, the salary increased by

25 %

and became

Rs . 20000

.
Let the original salary

= x

.
Increase in salary

= 25 %

Rs . x

= (\frac{25}{100}) \times x

= (\frac{25 x}{100})

= (\frac{x}{4})

Salary after increase

= (x + (\frac{x}{4}))

= \frac{(4 x + x)}{4}

= (\frac{5 x}{4})

Increased salary

= Rs . 20000

\frac{5 x}{4}

⇒

x = \frac{(20000 \times 4)}{5}

⇒

x = 4000 \times 4

⇒

x = Rs . 16000

Therefore, the original salary of the man is

Rs . 16000

.
Hence, the correct option is 2.

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