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# Boats And Streams MCQ

## 10 Questions MCQ Test Quantitative Techniques for CLAT | Boats And Streams MCQ

Description
This mock test of Boats And Streams MCQ for Quant helps you for every Quant entrance exam. This contains 10 Multiple Choice Questions for Quant Boats And Streams MCQ (mcq) to study with solutions a complete question bank. The solved questions answers in this Boats And Streams MCQ quiz give you a good mix of easy questions and tough questions. Quant students definitely take this Boats And Streams MCQ exercise for a better result in the exam. You can find other Boats And Streams MCQ extra questions, long questions & short questions for Quant on EduRev as well by searching above.
QUESTION: 1

Solution:
QUESTION: 2

Solution:
QUESTION: 3

### A man rows a boat 28 km in 4 hours downstream and same distance upstream in 7 hours. The speed of the stream (in km/hr).

Solution:
QUESTION: 4

A boat goes at the speed of 6 km/hr in still water but it takes thrice as much time in going the same distance against the current. The speed of the current (in km/hr) is

Solution:
Let the velocity of the boat be v km/h and velocity of the current be u km/h.

When the boat goes in still water, its velocity is v=6 km/h.

When the boat goes against the current, its velocity is v-u=(6-u) km/h.

For distance S, time taken in still water to cover the distance = S/6 hous

For same distance S, time taken while going against the current = S/(6-u) hours.

According to given, S/(6-u) = 3*(S/6)

=> 1/(6-u) = 1/2
=> 6-u = 2
=> u=4 km/h.

So, the speed of the current is 4 km/h.
QUESTION: 5

A man can row 40 km upstream and 55 km downstream in 13 hours. Also he can row 30 km upstream and 44 km down stream in 10 hours. What is his speed in still water and the speed of the current.

Solution:
let rate upstream=x km/hr and rate downstream=y km/hr.

Then, 40/x +55/y =13… (i) and 30/x +44/y =10

Multiplying (ii) by 4 and (i) by 3 and subtracting, we get:11/y=1 or y=11.

Substituting y=11 in (i),we get:x=5.

Rate in still water =1/2(11+5)kmph=8kmph.

Rate of current=1/2(11-5)kmph=3kmph
QUESTION: 6

A man’s speed with the current is 15 km/hr and the speed of the current is 3 km/hr. what will be the man’s speed against the current.

Solution: This is easy!
When the man rows with the current his speed would be = His speed+Current's speed.
It is given the speed with current is = 15 Km/hr
speed of current = 3 Km/hr
so the speed of the man without current = 15-3= 12 Km/hr

so speed against current = Man's speed - Current's speed
so answer would be = 12-3= 9 Km/hr
QUESTION: 7

A boat can travel with a speed of 13 km/hr in still water. If the speed of the stream is 4 km/hr, find the time taken by the boat to go 51 km downstream.

Solution:
QUESTION: 8

A motor boat goes 10 km upstream and back again to the starting point in 55 minutes. Find the speed of the motor boat in still water, if Stream running at 2 mph

Solution:
QUESTION: 9

A boat, while going upstream, covers a distance of 10 km in 30 minutes and while running down stream, it covers the same distance in 25 minutes. What is the speed of the current in km/hr.

Solution:
QUESTION: 10

I can row 40 km down stream and 28 km upstream taking 10 hours each time – what is the speed of the current.

Solution: