A man swimming in a stream which flows $1 \frac{1}{2}$ km/hr finds that in a given time he can swim twice as far with the stream as he can against it. At what rate does he swim?

Created: 4 months ago | Updated: 2 months ago

4 \frac{1}{2} k m / h r

5 \frac{1}{2} k m / h r

7 \frac{1}{2} k m / h r

3 \frac{1}{2} k m / h r

Job Solution Janata Bank Ltd জনতা ব্যাংক || অফিসার (আরসি) (28-06-2024) গণিত

121

Add Description

Best Description

The speed of the stream is 1.5 km/hr.

Swimming with the Stream:

Effective speed with the stream = v+1.5 km/hr.

Swimming Against the Stream:

Effective speed against the stream = v−1.5 km/hr.

Distance Relationship:

Let t be the time for which he swims.
Distance covered with the stream = (v+1.5)×t.
Distance covered against the stream = (v−1.5)×t.
According to the problem, he can swim twice as far with the stream as he can against it: (v+1.5)×t=2×(v−1.5)×t

Solve for v:

v+1.5=2(v−1.5)

v+1.5=2v−3

2v−v =1.5+3

v=4.5

Therefore, the man swims at a rate of 4.5 km/hr.

4 months ago

0 0

তেঁতুলিয়া

If the sum of the 3 consecutive integers is 240, then the sum of the two larger integers is :

Created: 4 months ago | Updated: 2 months ago

none of them

169

১৬১

159

Job Solution Janata Bank Ltd Janata Bank Ltd - Assistant Executive Officer 25.02.2011 গণিত

618

Add Description

At what profit percent must an article be sold so that by selling at half that price, there will be a loss of 30%?

Created: 4 months ago | Updated: 2 months ago

25%

36%

42%

40%

Job Solution Janata Bank Ltd জনতা ব্যাংক || অফিসার (আরসি) (28-06-2024) গণিত

108

Add Description

The speed of three cars is in the ratio of 2 : 3 : 4 . The ratio of the times taken by these cars to travel the same distance is -

Created: 4 months ago | Updated: 2 months ago

2 : 3 : 4

4 : 3 : 6

৪ : ৩ : ২

৬ : ৪ : ৩

Job Solution Janata Bank Ltd জনতা ব্যাংক || অফিসার (আরসি) (28-06-2024) গণিত

102

Add Description

A boat covers 143 km upstream in 13 hours and the same distance downstream in 11 hours. What is the speed (in km / hr ) of the boat in still (without stream) water?

Created: 4 months ago | Updated: 2 months ago

10 km/hr

12 km/hr

14 km/hr

8 km/hr

Job Solution Janata Bank Ltd Janata Bank PLC || Officer (Rural Credit) (27-10-2023) গণিত

459

Add Description

A student walks from his house at a speed of $2 \frac{1}{2}$ K per hour and reaches his school 6 minutes late. The next day he increases his speed by 1 km per hour and reaches 6 minutes before school time. How far is the school from his house?

Created: 4 months ago | Updated: 2 months ago

1 \frac{1}{4} k m

1 \frac{3}{4} k m

2 \frac{1}{4} k m

2 \frac{3}{4} k m

Job Solution Janata Bank Ltd Janata Bank PLC || Officer (Rural Credit) (27-10-2023) গণিত

418

Add Description

A man swimming in a stream which flows 112km/hr finds that in a given time he can swim twice as far with the stream as he can against it. At what rate does he swim?

Related Questions

If the sum of the 3 consecutive integers is 240, then the sum of the two larger integers is :

At what profit percent must an article be sold so that by selling at half that price, there will be a loss of 30%?

The speed of three cars is in the ratio of 2 : 3 : 4 . The ratio of the times taken by these cars to travel the same distance is -

A boat covers 143 km upstream in 13 hours and the same distance downstream in 11 hours. What is the speed (in km / hr ) of the boat in still (without stream) water?

A student walks from his house at a speed of 2 12 K per hour and reaches his school 6 minutes late. The next day he increases his speed by 1 km per hour and reaches 6 minutes before school time. How far is the school from his house?

A man swimming in a stream which flows $1 \frac{1}{2}$ km/hr finds that in a given time he can swim twice as far with the stream as he can against it. At what rate does he swim?

A student walks from his house at a speed of $2 \frac{1}{2}$ K per hour and reaches his school 6 minutes late. The next day he increases his speed by 1 km per hour and reaches 6 minutes before school time. How far is the school from his house?