Raghu's tanker can fill a cistern in 4 hours. After half the cistern is filled, three more similar tankers are opened. What is the total time taken to fill the cistern completely?
Consider the given statements to be true and decide which of the conclusions logically follow(s) from the statements.
Statements:
All boys are girls. All girls are monkeys.
Conclusions:
1. All monkeys are boys.
2. All boys are monkeys.