No, it is not 1/4 pint.
10
That is 0.050 litre
15000
Depends on the size, contents, and dimensions of your garden. if it is classed as a small garden it would be about 100 letres, if it is classed as a middleish garden it would be about 500 letres and if it was classed as a large garden it would be about 1,000 letres
There are 2000ml in 2l
1000 L
About 4 letres
4500 million letres
4500 million letres
3000 that's easy
it need 100 letres