Final answer:
To calculate how long it takes a plane to travel 2100 km at 1100 km/h, use the formula t = d/v. The answer is 1.90909 hours, but since this is not an option, the closest is 2.0 hours, assuming no wind affects the plane's speed.
Step-by-step explanation:
To determine how long it takes for the plane flying west at 1100 km/h in a strong east wind to travel 2100 km, we need the wind speed to calculate the plane's ground speed. However, since the wind speed is not given, we will assume that the wind does not affect the plane for the purpose of answering the question. The time taken (t) by the plane to travel a distance (d) can be calculated using the formula:
t = d / v
Where:
- t is the time in hours,
- d is the distance in km, and
- v is the velocity of the plane in km/h.
Given:
- d = 2100 km,
- v = 1100 km/h.
Plugging the values into the formula, we get:
t = 2100 km / 1100 km/h = 1.90909 hours
This value does not match any of the options provided (a) 1.5 hours, (b) 2.0 hours, (c) 2.5 hours, (d) 3.0 hours. However, since the closest option to 1.90909 hours is 2.0 hours, the correct answer with the information given would be option (b) 2.0 hours.