No one can study more than 20 hours in a single day, the human brain gets bored if it studied 2 hours of the same subject so changing subjects every hour can help you study more but you can not study 20 hours no one can handle that.
55mins and 20hours
20hours
20hours
1200 mins in 20 hrs.
The plural form of study is studies
20hours 16minutes, IF they're on consecutive days.
wqeeqweqwe
The current environmental degradation is the cause of fish's death =]
Yes
yes
Yes
"The study's target group" is more concise and direct than "the target group of the study." It is clear and to the point.