To begin, this isn't "homework" I'm preparing to take a test that will have this types of questions and I wanted to see if I could get any insight and strategies to be able to solve these as quickly and accurately as possible; even mentally if there are any methods (for more complicated types)
So, obviously we've got our formulas:
Distance = Speed * Time
Speed = Distance / Time
Time = Distance / Speed
Also breaking up "chunks of time" in an hour
2 of 30 mins
3 of 20 mins
4 of 15 mins
5 of 12 mins
10 of 6 mins
12 of 5 mins
15 of 4 mins
20 of 3 mins
30 of 2 mins
An example of an easy question to do mentally would be:
Speed of 24 mph, how far would you travel in 1 hour 15 minutes?
0.25 of 24 is 6. Therefore, 24+6 = 30 miles
I'm wondering if anyone knows the quickest most efficient way to solving questions such as:
What speed covers 18 miles in 54 minutes
And if there's a simple way to do it mentally?
I appreciate your replies!
This site has some sample tests including the fuel consumption questions too.
Speed Distance Time | OASC: RAF Officer and Aircrew Selection Centre
Here's a fuel consumption question that I'm wondering what the quickest method to solve would be:
You travel 111 miles. How much fuel will you need if you burn 36 kgs per hour, and are travelling at 148 mph?