Question

We get 2 litres of kerosene less in Rs 360 if the price of kerosene increases by rs 2 per litre. Find the original price of kerosene per litre
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Answer 1

Answer:

let the original price of kerosene be x

Step-by-step explanation:

360/x - 360/(x+2) = 2

360(x+2)-360x = 2

x(x+2)

360x + 720 - 360x = 2

x²+2x

720 = 2

x²+2x 1

by cross multiplication

720 = 2x²+4x

2x²+4x-720 = 0

dividing both sides by 0

x²+2x-360 =0

expanding the middle term

x²+20x-18x-360= 0

x(x+20)-18(x+20)=0

(x-18)(x+20)=0

(x-18)=0 x=18

(x+20)=0 x= -20

price of kerosene can't be negative so

x=18 is suitable

so,the original price of kerosene per litre is ₹18

Answer 2

Answer:

so original price of kerosene is rupees 18