2 hr 10' 34'' ≈ 2.18 hr
10' + (34/60)' ≈ 10.57'
10.57' ≈ 0.18 hr
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x= 3600a + 60b + c ( a hr x 3600 sec / hr ) + ( b min x 60 sec / min ) + c sec = x sec
1 hour = 60 x 60 = 3600 sec 5 hours = 5 x 3600 = 18000 sec 30 min = 1800 sec Therefore 5 hours and 30 minutes = 18000 + 1800 = 19800 sec
20 min=1,200 sec 6 hours=21,600 sec 6 hours and 20 minutes=22,800
1 min = 60 sec 30 min = 1800 sec
1 min = 60 sec 6 min = 6 x 60 = 360 sec