There are 3 pipes A, B and C. A can fill a bucket in 8 minutes. C can fill 18 5 buckets in 18 minutes & pipe B can fill 3 20 buckets in a minute. These pipes are opened in a tank alternatively, 1 minute each starting from A, then C, then B. If tank is filled after 2 hours, then find the volume of tank if the capacity of bucket is 5 liters.