John's monthly expenditure is 85% of his monthly salary and Jack's monthly expenditure is 90% of his monthly salary. Their combined expenditure is 88%. If John's monthly salary is Rs 60000, then what is the monthly salary of Jack?
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. Rs. 90,000.
Given:
John's monthly expenditure is 85% of his monthly salary = (85/100) × 60000 = 51000
The combined expenditure = (88/100) × (John's salary + Jack's salary)
Calculations:
Let Jack's salary be x.
⇒ 0.88 × (60000 + x) = 51000 + 0.9x
Simplifying the equation:
⇒ 52800 + 0.88x = 51000 + 0.9x
⇒ 0.02x = 1800
⇒ x = 1800/0.02
⇒ x = 90000
Therefore, Jack's monthly salary is Rs 90,000.