3QUESTION 3 OF 3
Answer & explanation
The official answer, with Fermi’s reasoning step by step.
Answer & explanation
Official answer
1,360
rackets
How to estimate it
Fermi’s official “Napkin math”
A doubles tennis court is about 78 by 36 feet, roughly 2,800 square feet. How much does one racket cover? Maybe 2 square feet. Divide and you land close.
- Court area
- ~2,800 ft²
- Racket footprint
- ~2 ft²
- 2,800 ÷ 2
- ≈ 1,400
A doubles tennis court is about 24 by 11 meters, roughly 260 square meters. How much does one racket cover? Maybe a fifth of a square meter. Divide and you land close.
- Court area
- ~260 m²
- Racket footprint
- ~0.2 m²
- 260 ÷ 0.2
- ≈ 1,300
Rounded assumptions may give a slightly different estimate. The official answer above is the game’s reference value.
Source calculation & reference
- Doubles court area
- 78 × 36 = 2,808 ft²
- Convert to in²
- × 144 = 404,352 in²
- Racket footprint
- ≈ 27 × 11 = 297 in²
- 404,352 ÷ 297
- ≈ 1,360
Reference cited by Fermi: International Tennis Federation
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