mohamedessawy2006 mohamedessawy2006

26-03-2021
Mathematics

contestada

There is a value of x for which the volume of the cuboid is a maximum.
(b) Find this value of x.
Show your working clearly.
Give your answer correct to 3 significant figures.

Respuesta :

fischershondray fischershondray

26-03-2021

Answ

what is this for

Step-by-step explanation:

A cuboid with side lengths x, x and h has a surface area of

S=2x2+4xh.

We know that the total surface area should be 150cm2, so

150⟹150−2x2⟹h=2x2+4xh=4xh=75−x22x.

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