What is a conceivable task

The definition of a conceivable task is capable of being imagined or done mentally. When you are capable of completing a task mentally, this is an example of a task that would be described as conceivable. Plz mark brainliest.

Hypothesis: volumes of both figures are equal.the volume of  figure 1 is: .the volume of figure 2 is: .since , you can conclude that and . so, .volumes of figures are equal only when an angle in the basis is right (then figures will be the same), in another cases volume of figure 1 is less than volume of figure 2.the hypothesis was not correct in all cases.