How do I calculate how long it will take to travel from...?

cross multiply 64.7 over x = 240 over 60

64.7 times 60 divided by 240 (useth thine calculator.. i not have 1 at thou moment) is your answer on the minutes it'll take

boobies. BOOBS. rawrr

One way to figure out these kinds of questions is to let the units help you. You have two numbers. One is in km/h. The other is in km. You are going to do some simple thing like multiply or divide one by the other. But how to figure out what to do. The answer needs to be in units of time. In this case, that's hours. So you have to make the km cancel out in the two numbers you are starting with. They won't cancel if you multiply them because you'd end up with km x km / h. That's no good. So you will have to divide one by the other. Then the km parts will cancel. If you divide km/h by km, the km cancel fine, but the hour part ends up in the denominator. That's no good, the answer has to be hours (in the numerator). So just take the other order. Divide the km bit by the km/h bit. The km parts cancel, and dividing by the 1/h bit put the h in the numerator. That's what you need. And it didn't require any real understanding about velocity or distance or time. It just needed figuring out how to make the units you didn't need cancel and get left with the units you did need.