Anand can row a boat in still water at a speed of 5 kmph. The speed of the stream is 3 kmph. Fin

Name: Problem 15, Chapter 2: Computer Science and Information Technology
Uploaded: 2022-01-09T15:01:50-08:00
Duration: 2 min 11 s
Channel: Vishal Gupta
Description: Anand can row a boat in still water at a speed of 5 kmph. The speed of the stream is 3 kmph. Find the time taken by him to row 40 km downstream (in hours). (A) 5 (B) 20 (C) & (D) 10

step 1 Hi, here in this given problem, speed of the boat in still water that is given as VB is equal to

Question

Anand can row a boat in still water at a speed of $5 \mathrm{kmph}$. The speed of the stream is $3 \mathrm{kmph}$. Find the time taken by him to row $40 \mathrm{~km}$ downstream (in hours). (A) 5 (B) 20 (C) \& (D) 10

   Anand can row a boat in still water at a speed of $5 \mathrm{kmph}$. The speed of the stream is $3 \mathrm{kmph}$. Find the time taken by him to row $40 \mathrm{~km}$ downstream (in hours).
(A) 5
(B) 20
(C) \&
(D) 10

Computer Science and Information Technology

Trishna Knowledge… 2018 Edition

Chapter 2, Problem 15

Instant Answer

Solved by Expert Vishal Gupta

01/09/2022

Step 1

The speed of the boat in still water is given as 5 km/h and the speed of the stream is given as 3 km/h. Since downstream means in the direction of the stream, we add these two speeds together. This gives us: \[v_{BS} = v_B + v_S = 5 \, \text{km/h} + 3 \, Show more…

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Anand can row a boat in still water at a speed of $5 \mathrm{kmph}$. The speed of the stream is $3 \mathrm{kmph}$. Find the time taken by him to row $40 \mathrm{~km}$ downstream (in hours). (A) 5 (B) 20 (C) \& (D) 10

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Key Concepts

Relative Motion in Fluids

This concept involves understanding how the velocity of an object (like a boat) is affected by the movement of the medium (such as a stream). In such problems, the effective speed when moving along with the flow (downstream) is the sum of the object's own speed in still water and the speed of the stream.

Distance-Time Relationship

This key concept is based on the formula time = distance / speed. It is used to calculate the time taken for a journey when the distance traveled and the effective speed of movement are known, making it essential for solving problems about motion and travel.

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