Question

A boat traveled 240 miles each way downstream and back. The trip downstream took 10 hours.
The trip back took 40 hours. What is the speed of the boat in still water? What is the speed of
the current?

Answer 1

how

Answer 2

first, divide the miles traveled by the time downstream \[240/10\]

Answer 3

it equals 24

Answer 4

then do the same thing for the time downstream \[240/40\]

Answer 5

this equals 6

Answer 6

add the two values

Answer 7

and divide by 2

Answer 8

30/2 = 15

Answer 9

the boat speed is 15 mph

Answer 10

thank you

Answer 11

let the speed of boat=x m/hr
speed of stream=y m/hr
time taken downstream=10 hrs
time taken upstrestream= 40 hrs
resultant speed downstream=(x+y) m/hr
resultant speed upstream=(x-y) m/r
then (x+y)(10)=240
x+y=24 ...(1)
(x-y)(40)=240
x-y=240/40=6 ...(2)
add (1) and (2)
2x=30
x=30/2=15
x+y=24
15+y=24
y=24-15=9
speed of boat=15 m/hr
speed of stream=9 m/hr

Answer 12

sorry, someone called me, I wasn't able to give you the speed of the stream

Answer 13

yw