Which term of the A.P. 18, 15, 12, ………… is the first negative term ?

1. 6^th

2. 8^th

3. 7^th

4. 5^th

A thick card-board is cut into the shape as shown alongside. It is given a full round about its line of symmetry (shown by dotted line). The solid so formed has :

(i) one cone and one cylinder

(ii) two cones only

(iii) two cones and one cylinder

Which of the statements given above is true ?

1. only (i)

2. only (iii)

3. only (ii)

4. (ii) and (iii)