Question

A man swims 30 feet down stream, and 15 feet a minute up stream. How long will it take him to
swim 90 feet up stream and back? *
0 h. 20
O c. 9
O k. 15
O x. 7
r. 12
​

Answer 1

Answer:

C is the correct answer

Answer 2

Given:

30 feet = down stream

15 feet = up stream

Find how long will it take him to  swim 90 feet up stream and back

We know that

$Time=\frac{Distance}{Time}$

So according to question time it will take him to  swim 90 feet up stream and back

$\frac{90}{30} +\frac{90}{15}$

=3 + 6

= 9

So the correct option is "c"

Hence the answer is 9