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Time Units #1 - Answers

Answers:

1. 1hr 15 min = 60min + 15min = 75min
   
   
2. 90 min = 60min + 30min = 1hr 30 min
   
   
3. 1 min25 sec = 60 sec + 25 sec = 85 sec
   
   
4. 2 hr 45 min 35 sec = 2 x 3600 + 45 x 60 + 35 = 7200 + 2700 + 35 = 9935 sec
   
   
5. 1 hr 35 min 15 sec = 3600 sec + 35 x 60 sec + 15 sec = 3600 sec + 2100 sec + 15 sec = 5715 sec
   
   
6. 2 hr 45 min = 2 x 60 min + 45 min = 120 min + 45 min = 165 min
   
   
7. 106 min = 60 min + 46 min = 1hr 46 min
   
   
8. 1 hr 130 sec = 1hr ( 2 x 60 sec + 10 sec) = 1 hr 2 min 10 sec
   
   
9. 1200 < 3600 , hence there are 0 hr in 1200 sec; 1200 : 60 = 20, hence: 1200 sec = 0 hr 20 min 0 sec
   
   
10. 5344 : 3600 = 1 R(1744); 1744 : 60 = 29 R (4); 5344 = 1 hr 29 min 4 sec
    
    
11. 4000 sec = 4000 : 3600 = 1 R (400); 400 : 60 = 6 R (40); 4000 sec = 1 hr 6 min 40 sec

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