Answer: 7.2 $ will be needed to get 6 Euros.
Explanation:
Given : 3$ could be exchanged for 2.5 euros
That means :
To get 2.5 euros , dollars needed are = 3$
By using Unitary method:
To get 1 euro , dollars needed are =
$
To get 6 euros , dollars needed are =
$
Thus 7.2 $ will be needed to get 6 Euros.