Mark J. answered • 10/18/19

Semi-Retired Mechanical Engineer & Mathematician

Assuming the same thickness of the pancake, we compare volumes of the pancakes, let the thickness be

1 unit.

Volume Pancake 1 = (pi*D^{2}/4)(1) = pi*(4)^{2}/4 = 4*pi in^{3}

Volume Pancake 2 = (pi*(6)^{2}/4) = 9*pi in^{3}

Pancake 2 is 9*pi/4*pi = 9/4 "larger" and would have 9/4 times the fat in pancake 1

So, the fat in Pancake 2 = (9/4)*7 = 15.75 grams of fat