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Linear Equations In One Variable

Question
CBSEENMA8002287

Hasan buys two kinds of cloth materials for school uniforms, shirt material that costs him Rs 50 per metre and trouser material that costs him Rs 90 per metre. For every 2 metres of the trouser material he buys 3 metres of the shirt material. He sells the materials at 12% and 10% profit respectively. His total sale is Rs 36,600. How much trouser material did he buy?

Solution

Let the length of cloth for trousers = 2x metres

∴    The length of cloth for shirts = 3x metres
              Cost of trouser's cloth = 2x cross times Rs 90
                                           = Rs 180 x
              Cost of shirt's cloth = 3x cross timesRs 50
                                        = Rs 150 x
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                                               = Rs 198 x
S.P. of shirt's cloth at 12% profit = Rs 112 over 100 cross times 150 x
                                          
                                            = Rs 168x

∴                               Total S.P. = Rs 198x + Rs 168x
                                              = Rs 366x
  But the total                      S.P. = Rs 36600

∴                                      366x = 36600
or                                          x equals 36600 over 366   [Dividing both sides by 366]
                                                = 100

∴                                         2x = 2 cross times 100 = 200
   Thus, he bought cloth for trousers = 200 metres.

   

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