A machine uses gasoline at a rate of 1/5 gallon an hour. So far 9/10 of a gallon has been used. How many hours has the machine o

Question

1 year ago

5

perated?

1 answer:

uysha [10] · Answer 1 · 2024-03-06T13:09:33+03:00

The machine was operated for 4.5 hours

A machine uses gasoline at a rate of 1/5 gallon per hour

The number of hours it will take the machine to use 9/10 gallon can be calculated as follows

1/5 = 1

9/10= x

cross multiply

1/5x= 9/10

0.2x= 0.9

x= 0.9/0.2

x= 4.5

Hence the machine was operated for 4.5 hours