Average salary of 20 workers in an office is Rs. ,1900 per month. If manager's salary is added,

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The average salary of $20$ workers in an office is $Rs. \,1900$ per $month.$ If the manager's salary is added, the average becomes $Rs. \,2000$ per $month.$ The manager's annual salary (in $Rs.$) is

A

$24000$

B

$25200$

C

$45600$

D

$48000$

Solution

Total monthly salary of $20$ workers in an office $=1900 \times 20=\text { Rs. } 38000$

Total monthly salary of $20$ workers and manager $=2000 \times 21$ $=$ Rs. $42000$

Manager monthly salary $=42000-38000=$ $Rs. 4000$

Manager annual salary $=12 \times 4000=$ $Rs. 48000$

Standard 13

Quantitative Aptitude

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