Calculate the required average speed to complete the mission as specified. Enter your nume… — Armed Services Vocational Aptitude Battery (ASVAB)

Calculate the required average speed to complete the mission as specified. Enter your numerical answer in the blank.

Cevap:A surveillance aircraft is assigned a

420

-mile mission route. The aircraft completes the first

240

miles of the route in

3

hours. To achieve an overall average speed of

60

miles per hour for the entire mission, the aircraft must complete the remaining distance at an average speed of 【45】 miles per hour.

To find the required speed for the second leg, you must first determine the total time allowed for the trip. Since the total distance is

420

miles and the target average speed is

60

mph, the total time must be

7

hours. The first leg took

3

hours, leaving

4

hours for the remainder of the trip. The remaining distance is

180

miles (

420 - 240

). Dividing the remaining

180

miles by the remaining

4

hours gives the required speed of

45

mph.

Calculate the total time allowed for the entire mission.

Total Time =

420 \text{ miles} \div 60 \text{ mph} = 7 \text{ hours}

Overall average speed requires knowing the total allowable time, which is found by dividing the total distance by the target average speed.

Determine the remaining distance to be covered.

Remaining Distance =

420 \text{ miles} - 240 \text{ miles} = 180 \text{ miles}

Subtract the distance traveled during the first leg from the total mission distance.

Determine the remaining time available.

Remaining Time =

7 \text{ hours} - 3 \text{ hours} = 4 \text{ hours}

Subtract the time spent on the first leg from the total allowable mission time.

Calculate the required average speed for the remaining distance.

Required Speed =

180 \text{ miles} \div 4 \text{ hours} = 45 \text{ mph}

Speed is calculated by dividing the remaining distance by the remaining time.

Average Speed

Soru