Question

a boat travels with a speed of 8km/hr in a river flowing with a speed of 2km/hr in the opposite direction of the flow.How much distance will it cover in 3hrs?​

Answer 1

Answer

• Distance travelled in 3 hours => 18 Km.

Given

• A boat travels with a speed of 8Km/h in a river flowing with a speed of 2Km/h in the opposite direction of the flow.

To Find

• Distance covered by the boat in 3 hours.

Step By Step Explanation

We know that a boat travels with a speed of 8Km/h in a river flowing with a speed of 2Km/h in the opposite direction of the flow.

We need to find the distance covered in 3 hours.

So, Let's do it !!

Speed of the boat by which it will move in the river will be = speed of the boat - speed of the current.

=> 8 Km/h - 2 Km/h

=> 6 Km/h.

$\dag\bold{\boxed{\sf{\red{Speed = \cfrac{Distance}{Time}}}}}$

By substituting the value

$\longmapsto \sf6 = \cfrac{Distance}{3} \\ \\ \longmapsto \sf6 \times 3 = Distance \\ \\ \longmapsto \sf \: Distance = 18km$

Therefore distance travelled in 3 hours will be 18 Km.

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Answer 2

$\huge\mathtt\pink{A}\mathtt\red{N}\mathtt\blue{S}\mathtt\green{W}\mathtt\purple{E}\mathtt\green{R}$

$\\: \: \: \: \: \: \: \rightarrow \mathtt \red{according \: to \: question}$

$\\: \: \: \: \: \: \: \rightarrow \mathtt \blue{original \: speed \: of \: river = 8 - 2 = 6}$

$\\: \: \: \: \: \: \: \rightarrow \mathtt \green{distance = speed \times time}$

$\\: \: \: \: \: \: \: \rightarrow \mathtt \purple{d = 6 \times 3}$

$\\: \: \: \: \: \: \: \rightarrow \mathtt \blue { \fbox{ = 18km}}$