Elimination Method of Finding Solution of a Pair of Linear Equations
A man gets Rs...
Question
A man gets Rs. 100 per day if he works, but he is fined by Rs. 10 per day if he is absent. In the whole month of April he received Rs. 1900 only. How many days did he work ?
A
20 days
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B
22 days
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C
29 days
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D
23 days
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Solution
The correct option is A 20 days Let the man works for x days in April and he is absent for y days. Since, April has total 30 days. ∴x+y=30 .........(1) According to question: 100x−10y=1900⇒10x−y=190 ....(2) Adding (1) and (2). we get, 11x=220 ∴x=20 Hence the man worked for 20 days in April.