Subject :IMO Class : Class 6

The ratio of the volume of water in Bottle *P* to the volume of water in Bottle *Q* is 3 : 4. Rajeev drank 40 mL of the water from Bottle *P* and the ratio then became 13 : 20. How much water was there in bottle *P* at first?

A 60 mL

B 80 mL

C 300 mL

D 400 mL

Find answer