It will take 20 min to go 20 miles at 60 mph.
20 min is one third of an hour so 55/3 miles...
(1 mile/3 min) * (60 min/1 hour) = 20 MPH.
He drove 20 miles in 50 min. so average was 20 x 60/50 = 24 mph
1.7 miles in 20 minutes equates to 5.1 mph
It will take 20 min to go 20 miles at 60 mph.
20 min is one third of an hour so 55/3 miles...
65 mph = 1.083r miles per min 55 mph = 0.916r miles per min therefore 20 miles @ 65 = 18.46 mins 20 miles @ 55 = 21.83 mins so you save 3.37 mins, provide a constant speed, not including time to accelerate.
(1 mile/3 min) * (60 min/1 hour) = 20 MPH.
20 min: 60 mph = 1 mpmin
MPH (miles per hour) is a measure of speed. 20 mph means you will travel 20 miles each hour at that speed.
At 60 MPH average, about 8 hr 20 min.
At 60 MPH average, about 1283 hr 20 min.
At 60 MPH average, about 23 hr 20 min.
At 60 MPH average, about 35 hr 20 min.
At 60 MPH average, about 22 hr 20 min.
He drove 20 miles in 50 min. so average was 20 x 60/50 = 24 mph