The connecticut river flows at a rate of 4 km/hr for the length of a popular science route. in order for a cruiser to travel 60 km upriver anf then return in a total of 8 hr. , how fast must the boat be able to travel in still water?

good luck!

cutie~

d. bc = 12 and ef = 16

step-by-step explanation:

we are given that δabc : δdef such that .

also, it is given that

so, from the options, we need that .

a.

b.

c.  

d.

as, we can see that only option d gives the same ratio as i.e. .

hence, the possible lengths are bc = 12 and ef = 16.