120
4 hr and 21 min
There are 60 min in an hr ... SO60 min x 2½ min/hr = 150 min.
time = distance ÷ speed = 6.5 miles ÷ 2 miles/hour = 3.25 hours 1 hr = 60 min → 0.25 min = 0.25 x 60 = 15 min → 3.25 hr = 3 hr 15 min.
60 min = 1 hr ⇒ 330 min = 330 ÷ 60 hr = 51/2 hr = 5.5 hr
156 mi / 55 mph = 2.84 hr = 2 hr 50 min
2 hr 5 min.
2 hr 37 min
134 mi / 60 mph = 2.23 hr = 2 hr 14 min.
4 hours and 1 minute.
(2 pt/min) * (1 gal / 8 pt) * (60 min/hr) = (2 * 1 * 60 * pt * gal * min) / (8 * min * pt * hr) = 15 gal/hr
4 hr 30 min ÷ 3 = 1 hr 30 min Either work directly, remembering 1 hr = 60 mins: 4 hr ÷ 3 = 1 hr remainder 1 hr 1 hr + 30 min = 60 min + 30 min = 90 min 90 min ÷ 3 = 30 min ⇒ 1 hr 30 min Or, convert to minutes, do the calculation and convert back: 1 hr = 60 min ⇒ 4 hr 30 min = 4 x 60 min + 30 min = 270 min 270 min ÷ 3 = 90 min 60 min = 1 hr ⇒ 90 min = 90 ÷ 60 hr = 1 hr 30 min Alternatively working in hours: 30 min = 30 ÷ 60 hr = 0.5 hr ⇒ 4 hr 30 min = 4 hr + 0.5 hr = 4.5 hr 4.5 hr ÷ 3 = 1.5 hr = 1 hr + 0.5 hr = 1 hr + 0.5 x 60 min = 1 hr 30 min
(1 mile)/(90 miles/hr) = (0.01111... hr)*(60 min/hr) = 0.66667 min or 40 sec.