Question

Un kg de banane costa cat doua kilograme de portocale . Un restaurant a cumparat 30 de kg de portocale si 45 de kg de banane , pentru care a platit 360 de lei . Determinati pretul unui kg de portocale.

am nevoie urgent de raspuns .

Answer 1

One kilogram of oranges cost $3.

Explanation:

The problem states

• 1 kilogram of bananas costs as much as 2 kilograms of oranges. (
  `1 \ kg \ bananas = 2 \ kg \ oranges`)
• 30 kilograms of oranges plues 45 kilograms of bananas cost $360.

Let's call
`x` one kilogram bananas and
`y` one kilogram oranges. The cost is related by

`x=2y`

Also, we know by given

`45x+30y=360`

Replacing the first equation into the second one, we have

`45(2y)+30y=360\\90y+30y=360\\120y=360\\y=(360)/(120)\\ y=3`

Then, we find the other value

`x=2(3)=6`

Therefore, one kilogram of oranges cost $3.