Two pipes A and B can fill a cistern in 20 minutes and 30 minutes respectively. If these pipes are turned on alternately for 1 minute each how long will it take to the cistern to fill?
Answers
Answered by
0
Answer:
sjjwjwnsbsbsjiklslllksnsnjjidjdjjdkkdod
Step-by-step explanation:
Ibma herebgor points wbjskskwnnhebjikendndnbdbbb
Similar questions