Question

Fran swims at a speed of 2.62.6 ​km/h in still water. The Lazy River flows at a speed of 0.30.3 ​km/h. How long will it take Fran to swim 88 km​ upstream? 88 km​ downstream?

Answer 1

Answer:

Fran's upstream time =  37.93 hrs

Fran's downstream time =  30.13 hrs

Explanation:

given data

speed in still water = 2.62 km/h

River flows = 0.3 km/h

Fran to swim upstream =  88 km​

solution

we will apply here distance formula that is

distance  = speed  × time   ...................1

put here value

so here

Fran's upstream speed = 2.62 km/h - 0.3 km/h  = 2.32 km/h

Fran's downstream speed = 2.62 km/h + 0.3 km/h = 2.92 km/h  

so

Fran's upstream time = $\frac{88}{2.32}$  = 37.93 hrs

Fran's downstream time = $\frac{88}{2.92}$ = 30.13 hrs