Question

plz help me to find answer of this question​

Answer 1

Answer:

Step-by-step explanation:

Hi ✌️✌️

Let length of the cloth = x 

Cost of cloth per m = y 

x * y = 200

y = 200/x ....(1)

 Conditions-

1.If the piece were 5m longer

2.Each metre of cloth costed Rs 2 less

(x+5)(y -2) = 200.

xy -2x + 5y -10 = 200

Substituting  value of (1)

1000/x - 2x = 200 - 190

1000 -2x²= 10x

500 -x²= 5x

x²+5x - 500 = 0

(x-20) (x+25) = 0

x= 20 (neglecting x= -25)

y = 200/x = 200/20 = 10

 Length of the piece of cloth is 20 m and rate per metre is Rs 10

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