To determine the estimated wind speed in miles per hour (mph) for a strong gale, we would follow these steps:
1. Determine the Range of Wind Speed in Knots for a Strong Gale:
- According to the given classification table, a strong gale corresponds to wind speeds of 41 to 47 knots.
2. Calculate the Average Wind Speed in Knots:
- Since we want the best estimate for the wind speed, we take the average of 41 and 47 knots.
- The calculation is [tex]\(\frac{41 + 47}{2} = 44\)[/tex] knots.
3. Convert Knot Speed to Kilometers per Hour (km/h):
- We use the conversion factor [tex]\(1\)[/tex] knot is approximately [tex]\(1.852\)[/tex] kilometers per hour.
- Therefore, [tex]\(44\)[/tex] knots is [tex]\(44 \times 1.852 = 81.488\)[/tex] kilometers per hour.
4. Convert Kilometers per Hour to Miles per Hour:
- We use the conversion factor [tex]\(1\)[/tex] kilometer per hour is approximately [tex]\(0.621\)[/tex] miles per hour.
- Therefore, [tex]\(81.488\)[/tex] kilometers per hour is [tex]\(81.488 \div 1.609 \approx 50.645\)[/tex] miles per hour.
So, the best estimate for the wind speed in miles per hour for a strong gale is [tex]\(\boxed{50.645}\)[/tex] miles/hour.
