PDF chapter test TRY NOW

Convert the following:
 
(i) 20 minutes into seconds 
 
seconds
 
(ii) 5 hours 35 minutes 40 seconds into seconds
 
seconds
 
(iii) 3 \frac{1}{2} hours into minutes
 
minutes
 
(iv) 580 minutes into hours
 
hours minutes
 
(v) 25200 seconds into hours
 
hours