The speed of the boat in still water is 5 times the speed of the current. It takes 1.1 hours to row to point B from point A downstream. The distance between point A and point B is 13.2 km. How much distance will it cover in 312 minutes upstream?

43.2 km

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48 km

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41.6 km

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44.8 km

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40 km

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Solution

The correct option is C 41.6 km
Let the speed of the current be x.
Then, the speed of the boat is 5x.
Total speed in downstream
= x + 5x = 6x
Total speed in upstream
= 5x - x = 4x = 8 km

1.1 $\times$ 6x = 13.2 $\Rightarrow$ x = 2
Required Distance covered = Time $\times$ Speed
$= \frac{26}{5} \times 8 = 5.2 \times 8 = 41.6 k m$

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The speed of the boat in still water is 5 times the speed of the current. It takes 1.1 hours to row to point B from point A downstream. The distance between point A and point B is 13.2 km. How much distance will it cover in 312 minutes upstream?

The correct option is C 41.6 kmLet the speed of the current be x. Then, the speed of the boat is 5x. Total speed in downstream = x + 5x = 6x Total speed in upstream = 5x - x = 4x = 8 km 1.1 × 6x = 13.2 ⇒ x = 2 Required Distance covered = Time × Speed =265×8=5.2×8=41.6km