Good God, some bone questions get put on here. There's 1760 yards in a mile. If you are too lazy to divide by 2 to get half a mile then that is 880. Add them together. Double the length of the footie pitch and double the wide then add them together. Divide that into the number of yards in a mile and a half. Fuck me, you should be able to do it in your head and it'll give you something to do when you're running round it 43 times. If you can tear that iPod off your ears, of course. Bin the BARB test and bring back basic arithmetic.
If I sit in a bag in a bath with the plug in (assume the bath is rectangular and measures 6' x 18" x 18") and cold water flows through the tap at 3 pints a minute, how long would it take for me to drown if my mouth is 15" above the bottom of the bath.
When I was a lad, we had to do that sort of mental arithmetic for ye electronic calculator had not been invented.
Now assume the bath has a leak at the rate of a quarter gill every 20 seconds. What difference would this make? (Show your workings.)