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April 21, 2014

April 21, 2014

Posted by **amit sharma** on Thursday, May 9, 2013 at 4:15pm.

1. 5523.9cm3

2. 6525.9cm3

3. 4225.9cm3

4. 4525.9cm3

- aptitude -
**Steve**, Thursday, May 9, 2013 at 4:19pm26^2-24^2 = 100

So, the porridge must be at least 10 cm deep.

The volume of porridge is thus at least 1440π = 4523.9 cm^3

- aptitude -
**amit sharma**, Thursday, May 9, 2013 at 4:24pmhw did u get dis ??

The volume of porridge is thus at least 1440π

- aptitude -
**Steve**, Thursday, May 9, 2013 at 4:36pmvolume of a cylinder v = πr^2 h

They wouldn't be asking this kind of question if you hadn't learned that.

Now, how did I get a depth of 10 cm?

Draw a diagram of the pot and spoon, as seen from the side. The spoon is lying with one end on the bottom of the pot, and the other end leaning against the side of the pot.

Recall the Pythagorean Theorem. You have a right triangle with the spoon forming the hypotenuse, and the diameter of the bottom of the pot forming one leg. If the depth is d,

24^2 + d^2 = 26^2

d=10

Whenever you get one of these problems, it always pays to draw a diagram, and review what you have studied so far. The answer will come from using the topics covered; these are not just random problems pulled out of a hat.

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