What is the hcf of 60 and 72

60 and 72

HCF

Firstly let's find its factor

60 = 1,2,3,4,5,6,10,12,14,20,30,60

72 = 1,2,3,4,6,8,9,12,18,24,36,72

Common Factor = 2,3,4,6,12

b. 1.25 hr

step-by-step explanation:

if you have a constant speed of 60 mph, then you have a ratio between 60 mi. to 1 hr. dividing both sides by 60 we get the ratio

1 mi. to

then mult. both sides by 75 we get the ratio

75 mi. to

simplifying we get

75 mi. to

or 1.25 hr.

x = 3 ± √(5+y)