Anonymous

D = rt 20 = 160t 20/160 = t 1/8 of an hour = t (1/8)(60) = 15/2 Answer: 7.5 minutes

Anonymous

time = distance/speed = 20/160 = 1/8 hour

Anonymous

7 1/2 minutes

Anonymous

The speed of the helicopter is 160 miles every hour. But you want to know about 1/8 that distance (20 miles) It would take 1/8 of the full hour (1/8 hour). Answer: 1/8 of an hour Or in minutes: 60/8 = 7½ minutes

Anonymous

In 60 minutes, the helicopter travels 160 miles. To travel 160 miles, it takes the helicopter 60 minutes To travel 1 mile, it takes the helicopter 60/160 = 6/16 minutes To travel 20 miles, it takes the helicopter (60/160)(20) = 7.5 minutes (7 min 30 sec)

Anonymous

The problem is relative, no Helicopter takes off or lands at high speeds. Consider traveling at 160 m/h and crossing a 20-mile field, what time does it do? 20 m/160 m/h = 1/80 h = 0125 h 1 h = 60 m 0125 * 60 = 7.5 minutes = 7' 30''

Anonymous

1/8 of an hour which is 7.5 minutes.

Anonymous

20/160 = 1/8 h = 7.5 min

Anonymous

7.5 minutes. 20/160 = 0.125 hr x 60 min/hr

Anonymous

7 and a half minutes. (160/60= miles a minute) 20 miles/miles a minute= how many minutes