Bob, jill, kim, and steve measure an object's length, density, mass, and brightness, respectively. which student must derive a unit of measurement?

a. bob

b. jill

c. kim

d. steve

The question is incomplete; However, the height from which the stone is thrown is most likely to be what's required of the question

See Explanation

Explanation:

Given

Required

Determine the height

This question will be answered using the following equation of motion;

Take g as 9.8

This gives:

(Approximated)

Hence; Height = 30.1m