Question

A full glass of water can hold 1/6 of a bottle. How many glasses of water can be filled with 3 1/2 bottles of water?

Answer 1

I'm using unitary method to solve this. see below

Explanation:

1 glass holds 1/6 of a bottle then 6 glasses hold 1 glass bottle water.

so, 1 bottle can give 6 glasses of water

then `3(1/2) or 7/2` bottle can give`6*7/2` glasses of water , that is 21 glasses.