2. Total number of trees =50*6=300. Current time =300/(50+ 10)=5 days.
3.200* 1/4-30=20
4. We have read 1/5+ 1/4=9/20. Let * * have x pages, x * (1-9/20) = 66, x = 120 pages.
The volume of potatoes is the bottom area multiplied by the height, that is, 3. 14*5*5*2= 157 cubic centimeters.
6 Total fruit =200/( 1/5)= 1000, that is, the fruit of the last two days is 1000-200=800, and the fruit of the third day is 800*(3/(2+3))=480.