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Anonymous A

on Mar 06, 2018

Global

Brainteaser: How many litres of water are there in the Atlantic ocean.

Hi could someone give me their solution approach to this question for comparison?

Thanks in advance!

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Vlad

Coach

on Mar 06, 2018

McKinsey / Accenture Alum / Got all BIG3 offers / Harvard Business School

Hi,

I will use the following approach:

You may use the speed of a plain as the benchmark and assume that the Ocean 1/2 of a Sphere:

It takes X hours to fly from A to B over the Atlantic Ocean
The average speed of a plane is Z
Thus the radius of the Ocean is 1/2 * X* (Z-1) (Because it takes extra hour to take off and land)
The volume of the sphere is 4/3 * p* rˆ3
The volume of the Ocean is 1/2 * 4/3 * p * rˆ3 (Half of the sphere)

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