Unspillable Cup

State two advantages of using disposable paper cups over disposable plastic cups.

Statements:- All cups are saucers. No saucer is a kettle. Conclusion:- I. No cup is a kettle. II. No kettle is a cup.

Statement : I. Some cups are glasses. II. No plate is cup as well as glass. Conclusion: I. Some cups are plates. II. All glasses are not plates.

A semi-circular sheet of metal of diameter 28cm is bent into an open conical cup.Find the depth and capacity of cup.