Ariver has a steady speed of 0.480 m/s. a student swims upstream a distance of 1.00 km and swims back to the starting point. (a) if the student can swim at a speed of 1.40 m/s in still water, how long does the trip take?

Steady speed of river = 0.480 m/s

Swimming speed of student in still water = 1.40 m/s  

When the student is swimming upstream the  velocity he is going up = 1.40-0.48= 0.92 m/s

When the student is swimming downstream the  velocity he is going down = 1.40+0.48= 1.88 m/s

Time taken to travel upstream =

Time taken to travel downstream =

Total time taken = 18.12+8.87 = 26.99 minutes

are there options? cause you ain’t. real specific

when a device is used in a circuit in which the voltage is 81 v, the current flowing through the device is 3 a. what is the resistance of the device?

a. 27 ω

b. 40.5 a

c. 243 ω

d. 243 a

the correct answer is a. 27