simplify the following
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Step-by-stemmp explanation:
Answered by
1
Answer:
Step-by-step explanation:
a) 7hrs25min50sec=7*60*60+25*60+50=3600*7+1500+50=25200+1500+50=
26750
8hrs20min40sec=8*3600+20*60+40=30040
26750+30040=56790sec
b) 4 years7mon17days+5years3mon25days
=(4*365+7*30+17)+(5*365+3*30+25)
=9*365+10*30+42
=3285+300+42
=3627days
c) 15hrs30min30sec-10hrs40min25sec
=15*3600+30*60+30-10*3600-40*60-25
=5*3600+20*60+5
=19205sec
d) 9yrs5mon24days-4yrs9mon13day
=9*365+5*30+24-4*365-9*30-13
=5*365-4*30+11
=1716 days
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