Answer :
Way 1:
seconds / gallons = 15 / 1 = x / 15
Cross multiply
x = 225
Way 2:
15 x 15 = 225 seconds
60 seconds in a minute so...
225/60 = 3.75
It will take Mary 3.75 minutes, approximately 4 minutes, to fill the tank with gasoline.
seconds / gallons = 15 / 1 = x / 15
Cross multiply
x = 225
Way 2:
15 x 15 = 225 seconds
60 seconds in a minute so...
225/60 = 3.75
It will take Mary 3.75 minutes, approximately 4 minutes, to fill the tank with gasoline.