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How many degrees does the minute hand of a clock turn in 30 minutes?
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.
What is the average speed of runner runs 10km in 30 minutes?
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
How much time passed from 8 15 and 4 45?
Assuming 24 hour times since no am/pm are present (though I would normally expect two digits for the hour, as in 08:15, etc) - 20 hours 30 mins. If the question is from 8:15am to 4:45pm (sounds like a plausible working day) then it is 12 hours less at 8 hr 30 min. 8 15 to 4 45 is: 08:15 to 09:00= 45 mins plus 9:00 to 12:00 = 3 hours plus 12:00 to 24:00 = 12 hours plus 00:00 to 04:00 = 4 hours plus 04:00 to 04:45 = 45 mins Which is 45 min + 3 hr + 12 hr + 4 hr + 45 min = 19 hr 90 min But 90 min = 1 hr 30, so total is 20 hr 30 min
How many days does it take to sail 2842 nautical miles at 15 knots?
1 kt = 1nm/hr 24 hr = 1 day → 2842 nm ÷ 15 kts = 2842 nm ÷ 15 nm/hr = 1897/15 hr = 1897/15 ÷24 days = 7161/180 days ≈ 7.9 days
How minutes in 1 hour 20 mins?
1 hour = 60 minutes so 1 hr and 20 mins = 60+20 = 80 mins. Simple!
