4 hr and 21 min
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4 hours and 1 minute.
10 hours and 15 minutes
8 hr 40 min + 1 hr 45 min = 10 hr 25 min
time = distance ÷ speed = 50 km ÷ 62 km/h = 50/62 hr = 25/31 hr ≈ 0.806 hr 1 hr = 60 min → 0.806 hr = 0.806 × 60 min ≈ 48.39 min 1 min = 60 sec → 0.39 min = 0.39 × 60 sec ≈ 23 sec Thus to cover 50 km at 62 km/h takes about 48 min 23 sec.
60 min = 1 hr ⇒ 330 min = 330 ÷ 60 hr = 51/2 hr = 5.5 hr