Brain Teasers & Mental Math
Estimate the weight of a fully loaded Boeing 747 at takeoff (order of magnitude).
Model answer
Build it up by component. Empty aircraft ~180,000 kg (~400k lb). Fuel for a long-haul flight ~150,000 kg. Passengers: ~400 people × ~75 kg = ~30,000 kg; add baggage/cargo ~20,000-40,000 kg. Total ≈…
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