If x:y=5:3 then (8x-5y): (8x+5y)=?​

Ben is three times as old as samantha, who is two years older than half of michel's age. if michel is 12. how old is ben?

Aremote-controlled boat can travel at 4 feet per second in calm water. the boat traveled 48 feet with the current, and then it traveled 16 feet against the current in the same amount of time. how fast is the current?

6cm10 cma conical paper cup has dimensions as shown in the diagram. how much water can the cup hold when full?