This question tested candidates' comprehension of the concept of projectile motion. It was well answered by many candidates. However, some candidates failed to realize that the initial speed of the vertical component of the motion was zero. Also some mistook drop in height for height from the ground.

The expected answer is:

           V =d/t
            OR       t= d/V
           = 30/40
           = 0.75s
           h = ½gt²
           = ½ x gt²
           =½ x 10x(O.75)²
           =2.81m