Tips & Tricks: Boats and Streams

# Tips & Tricks: Boats and Streams - Tips & Tricks for Government Exams - Bank Exams

## Introduction

• Downstream: If the boat is moving in the direction of the stream.
• Upstream: If the boat is moving in the direction opposite to the direction of the stream.

Assume the speed of the boat in still water as: ‘b’ kilometres per hour (kmph).
Take the speed of the stream as:  ‘s’ kmph.
Hence Aggregate Downstream Speed = b + s kmph. (Boat is moving with the steam of water).
Upstream Net Speed = b - s km/hr. (Boat is moving against the direction of the stream).

### Theory

• Stream – The moving water in a river is called a stream.
• Upstream – If the boat is flowing in the opposite direction to the stream, it is called upstream. In this case, the net speed of the boat is called the upstream speed
• Downstream – If the boat is flowing along the direction of the stream, it is called downstream. In this case, the net speed of the boat is called downstream speed
• Still Water – Under this circumstance the water is considered to be stationary and the speed of the water is zero

### Formula's

• Upstream: (u−v) km/hr
• Downstream: (u+v)Km/hr
• Speed of Boat in Still Water: ½ (Downstream Speed + Upstream Speed)
• Speed of Stream: ½ (Downstream Speed – Upstream Speed)
• Average Speed of Boat: {(Upstream Speed × Downstream Speed) / Boat’s Speed in Still Water}
• Speed of boat or swimmer in still water: 1/2 (Downstream Speed + Upstream Speed)

### Solved Examples

Question for Tips & Tricks: Boats and Streams
Try yourself:A Boat going upstream takes 8 hours 24 minutes to cover a certain distance, while it takes 5 hours to cover 5/7 of the same distance running downstream.Then what is the ratio of the speed of boat to speed of water current?

Question for Tips & Tricks: Boats and Streams
Try yourself:A Boat takes total 16 hours for traveling downstream from point A to point B and coming back point C which is somewhere between A and B. If the speed of the Boat in Still water is 9 Km/hr and rate of stream is 6 Km/hr, then what is the distance between A and C?

Question for Tips & Tricks: Boats and Streams
Try yourself:A Boat takes 128 min less to travel to 48 Km downstream than to travel the same distance upstream. If the speed of the stream is 3 Km/hr. Then Speed of Boat in still water is?

The document Tips & Tricks: Boats and Streams | Tips & Tricks for Government Exams - Bank Exams is a part of the Bank Exams Course Tips & Tricks for Government Exams.
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## Tips & Tricks for Government Exams

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## Tips & Tricks for Government Exams

66 videos|65 docs

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