yes as there are 60 secs in a min.
no, it is 1 min and 30 secs
3.5 min 3 min 30 seconds
90
1800 seconds are in 30 min.
90 seconds
14min 12 seconds
1 min = 60 s 1 hr = 60 min So 1 hr = 3600 s 5hr = 18,000 s and 30 min = 1800 s. Then 5 hr and 30 min = 19,800 seconds.
4 hr 30 min ÷ 3 = 1 hr 30 min Either work directly, remembering 1 hr = 60 mins: 4 hr ÷ 3 = 1 hr remainder 1 hr 1 hr + 30 min = 60 min + 30 min = 90 min 90 min ÷ 3 = 30 min ⇒ 1 hr 30 min Or, convert to minutes, do the calculation and convert back: 1 hr = 60 min ⇒ 4 hr 30 min = 4 x 60 min + 30 min = 270 min 270 min ÷ 3 = 90 min 60 min = 1 hr ⇒ 90 min = 90 ÷ 60 hr = 1 hr 30 min Alternatively working in hours: 30 min = 30 ÷ 60 hr = 0.5 hr ⇒ 4 hr 30 min = 4 hr + 0.5 hr = 4.5 hr 4.5 hr ÷ 3 = 1.5 hr = 1 hr + 0.5 hr = 1 hr + 0.5 x 60 min = 1 hr 30 min
90 seconds. One minute is 60 seconds, 0.5 of a minute (half) is 30 seconds. 60 + 30 = 90
5,400 seconds are in 1 hour 30 minutes.
1 minute = 60 seconds so 30 min = 30*60 = 1800 sec.
That depends what it is 90 of. If it is 90 seconds, this is equal to 1 minute, 30 seconds.