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What is the weight of Boeing 747?

Rishabh asked on Apr 01, 2018 - 2 answers

Taking airplane is empty.

Weight overall = Body weight + Wheel Weight

NO of wheels in 747 is 18

Weight?

Body weight = volume of airplane * density

Can someone tell me the proper approach to this Guesstimate?

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Vlad updated his answer on Apr 02, 2018
McKinsey / Accenture / Got all BIG3 offers / More than 300 real MBB cases / Harvard Business School

Hi!

This question is more a brainteaser and it's less about the actual weight but rather about how you will measure it.

You can use both non-creative and creative approaches:

1) You can weight each part of the plain separately: wheels, chairs, etc. Don't forget the paint

2) You can recommend tying a rope around the plane’s midsection, throwing that rope over a rafter at the top of the hangar and then attaching the other end of the rope to a large platform onto which you will quickly load bricks of a known and pre-defined weight until the plane lifts off the ground and then all you need to do is count the bricks.

Best

(edited)

Andrea
Expert
replied on Apr 02, 2018
Former BCG decision round interviewer with 300+ real interviews in 8 years

I think your approach is fine, but would augment by dividing the non empty volume in categories of materials (aluminium, foam, plastic) to be more precise.

Hope it helps,

Andrea