The exact answer is 11.9230769231
that is rounded to B. 12hr
Answer:
Option B.
Step-by-step explanation:
It is given that a car cruises at a constant rate of 52 miles per hour. It means
Speed of car = 52 miles per hour
Using front-end estimation, we need find the time taken by the car to cover 620 miles.
In front-end estimation, we approximate the data according to the first digit. So,
Speed of car = 52 miles per hour ≈ 50 miles per hour
Distance = 620 miles ≈ 600 miles
Formula for time:
[tex]Time=\frac{Distance}{Speed}[/tex]
Substitute distance=600 and speed=50 in the above formula.
[tex]Time=\frac{600}{50}[/tex]
[tex]Time=12[/tex]
The time taken by the car to cover 620 miles is approximate 12 hr.
Therefore, the correct option is B.
