A boat travels at 3.5 m/s with respect to the water in a river, while the velocity of the river itself is 1.1 m/s . The boat starts at a point on one shore and travels to a point directly across on the opposite shore. If the river is 62 m wide, how long does it take the boat to cross

the  time taken for crossing the boat is 18.67 seconds

Explanation:

The computation of the time taken for crossing the boat is shown below:

But before that we do the following calculations

=

= √12.25 - √1.21

= √11.04

= 3.32

Now the time taken for crossing the boat is

= 62 ÷ 3.32

= 18.67 seconds

Hence, the  time taken for crossing the boat is 18.67 seconds

And, the same is to be considered

explanation:

an enlarged virtual image is the answer

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