The price of 2 sarees and 4 shirts is Rs. 1600. With the same money one can…
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The price of 2 sarees and 4 shirts is Rs. 1600. With the same money one can buy 1 saree and 6 shirts. If one wants to buy 12 shirts, how much shall he have to pay ?
- A.
Rs. 1200
- B.
Rs. 2400
- C.
Rs. 4800
- D.
Cannot be determined
Attempted by 411 students.
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Correct answer: B
Let the price of a saree be x and the price of a shirt be y.
Form the two equations from the statements:
2x + 4y = 1600
x + 6y = 1600
Eliminate x: multiply the second equation by 2 to get 2x + 12y = 3200, then subtract the first equation (2x + 4y = 1600):
2x + 12y = 3200
Subtracting 2x + 4y = 1600 gives 8y = 1600, so y = 200.
Find x using x + 6y = 1600: substitute y = 200 to get x + 1200 = 1600, so x = 400.
Compute the cost of 12 shirts: 12 × y = 12 × 200 = 2400.
Answer: Rs. 2400.