Question

A builder wants to build a sump to store water in an apartment. The volume of the
rectangular sump will be modelled by V(x)= x3 + x2- 4x-4, given x = 4.
What is the storage capacity of this sump?
(a) 3000 litre (b) 6000 litre
(c) 60000 litre
(d) 30000 litre

with explanation.
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Answer 1

Storage capacity ==

(4)³+(4)²-4(4)-4 == 64+16-16-4 = 60 m³

1m³ = 1000L

Therefore 60 m³ == 60000 L

OPTION C ✔️