Subject

    গাণিতিক যুক্তি

    Topic

    সরলীকরণ

    The price of 2 sarees and 4 shirts is Tk. 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?

    ক)
    Tk. 1200
    খ)
    Tk. 2400
    গ)
    Tk. 4800
    ঘ)
    Cannot be determined

    Explanation

    Let the price of a saree and a shirt be Tk. x and Tk. y respectively. Then, 2x + 4y = 1600 .... (i) and x + 6y = 1600 .... (ii) Divide equation (i) by 2, we get the below equation. => x +  2y =  800 --- (iii) Now subtract (iii) from (ii) x +  6y = 1600  (-) x +  2y =  800 ---------------- 4y =  800 ---------------- Therefore, y = 200. Now apply value of y in (iii) =>  x + 2 x 200 = 800 =>  x + 400 = 800 Therefore x = 400 Solving (i) and (ii) we get x = 400, y = 200. So, Cost of 12 shirts = Tk. (12 x 200) = Tk. 2400.

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