Question

the sales in 2 shopes were in the ratio 4:7 after advertisement sale in shop a increase by 10% the difference in new sales is 79 arrivals find original sales
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Answer 1

Answer:

orignal sales at: a = 100

                          b = 175

Step-by-step explanation:

let the sale of a be x and b be y

so, x/y = 4/7

⇒ x = 4 y/7            (1)

and  (y+8 y/100)- ( x + 10 x/100)= 79

⇒108 y/100 - 110 x/100 = 79

⇒108 y - 110 x = 7900       (2)

on substituting the values

⇒108 y - 110(4 y/7)   = 7900

⇒108 y- 440 y/7   = 7900

⇒ (756 y - 440 y)/7 = 7900

  ⇒316 y = 55300

  ⇒ y = 175

now , x/y = 4/7

 ⇒ x/175 = 4/7

  ⇒x = 4 × 175/7

    => = 100

Answer 2

Answer:

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