Which means Marty’s pizza is more than one and a quarter the size of Luis’ pizza. We can comfortably just compare the area, since we can assume a flat disk with equal height for a pizza.
Assuming Luis’ pizza is a Domino’s Classic size of 25cm that’s an area of:
(25cm / 2)² * π = (625cm² / 4) * π = 490.874cm²
So Marty’s pizza should be more than 490.874cm² * 1.25 = 613.5925cm² for 4/6 of his to be greater than of 5/6 of Luis’, so:
So…
Which means Marty’s pizza is more than one and a quarter the size of Luis’ pizza. We can comfortably just compare the area, since we can assume a flat disk with equal height for a pizza.
Assuming Luis’ pizza is a Domino’s Classic size of 25cm that’s an area of:
So Marty’s pizza should be more than 490.874cm² * 1.25 = 613.5925cm² for 4/6 of his to be greater than of 5/6 of Luis’, so:
Since Marty’s pizza is greater, let’s go with 28cm diameter… which happens to match exactly a Domino’s Medium size.
That’s a very realistic scenario and the teacher is an absolute idiot for not understanding.