Answer & explanation
The official answer, with Fermi’s reasoning step by step.
Answer & explanation
Official answer
65,000
beach towels
How to estimate it
Fermi’s official “Napkin math”
Bondi is about a kilometer of sand. How far is it from the promenade down to the water? Maybe 50 meters. A beach towel is a bit over a square meter, so call it one towel a square meter.
- Beach length
- ~1,000 m
- Sand to the water
- × 50 m
- 1,000 × 50
- ≈ 50,000 m²
- One towel a square meter
- ≈ 50,000
Bondi is a bit over half a mile of sand, call it 3,000 feet. How far is it from the road down to the water? Maybe 200 feet. A beach towel is 2.5 by 5 feet, about 12 square feet.
- Beach length
- ~3,000 ft
- Sand to the water
- × 200 ft
- 3,000 × 200
- ≈ 600,000 ft²
- ÷ 12 ft² a towel
- ≈ 50,000
Rounded assumptions may give a slightly different estimate. The official answer above is the game’s reference value.
Source calculation & reference
- Bondi Beach: about 1 km long, 50 to 100 m wide (NSW State Heritage Register)
- ≈ 1,000 × 75 m = 75,000 m²
- One beach towel, 76 × 152 cm
- ÷ 1.16 m²
- 75,000 ÷ 1.16
- ≈ 65,000
Reference cited by Fermi: NSW State Heritage Register, Bondi Beach Cultural Landscape (about 1 km long, 50 to 100 m wide)
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