Answer:
He use 120 grams of flour.
Step-by-step explanation:
Given:
Flaky pastry can be made using flour and fat in the ratio 4 : 3. Jake makes some flaky pastry using 90 grams of fat.
Now, to find the weight of flour he use in making flaky pastry.
Let the weight of flour be [tex]x.[/tex]
Weight of fat = 90 grams.
The ratio of flour and fat used in making flaky pastry is 4 : 3.
As, 4 is equivalent to 3.
Thus, [tex]x[/tex] is equivalent to 90.
Now, to solve using cross multiplication method:
[tex]\frac{4}{3} =\frac{x}{90} \\\\By\ cross\ multiplying\ we\ get:\\\\360=3x\\\\Dividing\ both\ sides\ by\ 3\ we\ get:\\\\120=x\\\\x=120\ grams.[/tex]
Therefore, he use 120 grams of flour.
