If a person rows to his favorite fishing spot 14 miles downstream in the same amount of time that he rows 2 miles upstream and if the current is 6 mph, find how long it takes him to cover 16 miles. it will take the person _ hour(s) to cover a distance of 16 miles.

We will use distance formula which states:

where 'd' is the distance, 'r' is rate or speed and 't' is time taken.

So,

Let 'u' be the speed of boat in still water.

A person rows 14 miles downstream to the fishing spot.

So, the speed of boat downstream = (u+6) mph

Time taken by boat to go downstream = hr

He rows 2 miles upstream from the fishing spot.

So, the speed of boat upstream = (u-6) mph

Time taken by boat to go upstream = hr

Since, The person took same amount of time in going downstream and then going upstream.

So,

Cross multiplying, we get

u = 8

So, speed of boat in still water is 8mph.

Now, Time taken in going downstream =

=

= 1 hr

Now, Time taken in going upstream =

=

= 1 hr

So, total time taken to cover 16 miles is 2 hours.

4

step-by-step explanation:

distance covered by pamela in 9 l of fuel = 99km

let us apply unitary method here.

distance covered by pamela in 1 l of fuel =99/9 =11 km

now let us find distance covered by pamela if she has 12 l of fuel.

distance covered in 12 l = distance covered in 1 l of fuel * 12

we know that distance covered by here in 1 l is 11 km.

so distance covered in 12 l of fuel = 11*12 = 132 km.