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300min.
30 minutes ...There are 60 min in an hr, so a half an hr is 60/2 = 30 min.
That would be 270 minutes. 60 minutes in an hr. x 4 = 240 + 30 = 270
1 hr = 60 minutes 30 min / 60 min = 1/2
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 hr = 60 min½ hr = 30 min(9 x 60) + 30 = 540 + 30 = 570 min
60 mins = 1 hr → 30 mins = 30 ÷ 60 hr = ½ hr The hour hand does 1 full rotation every 12 hours → 1 hr = 1/12 full rotation → ½ hr = ½ × 1/12 rotation = 1/24 rotation in 30 mins → 360° × 1/24 = 15° → The hour hand moves 15° in 30 minutes.
90km/hr
Speed = Distance / Time = (10 km) / (30 mins) = 0.333 km/minNow what units do you want?km/hr: (30 mins)(1 hr/60 mins) = 0.5 hr so S = (10 km)/(0.5 hr) = 20 km/hr
22 minutes and 30 seconds. 30 miles/(80 miles/hr) = 3/8 hour = 22½ minutes.
3 hours, 35 minutes, and 45 seconds plus 1 hour, 45 minutes and 30 seconds is 5 hours, 21 minutes, and 15 seconds.
30ml/hr