A boat running upstream takes 6 hours 40 minutes to cover a certain distance while it takes 4 hours to cover the same distance running downstream, what is the ratio between the speed of boat and the speed of water current respectively?

# A boat running upstream takes 6 hours 40 minutes to cover a certain distance while it takes 4 hours to cover the same distance running downstream, what is the ratio between the speed of boat and the speed of water current respectively?

1. A

4:1

2. B

5:6

3. C

3:1

4. D

2:5

Fill Out the Form for Expert Academic Guidance!l

+91

Live ClassesBooksTest SeriesSelf Learning

Verify OTP Code (required)

### Solution:

Solution: Speed of  the boat in still water = x

Speed of  current = y

So,

$\left(6+\frac{40}{60}\right)\text{\hspace{0.17em}\hspace{0.17em}}\left(x-y\right)=4\left(x+y\right)$

$\left(\frac{36+4}{6}\right)\text{\hspace{0.17em}\hspace{0.17em}}\left(x-y\right)=4\left(x+y\right)$

$\frac{40}{6}\left(x-y\right)=4\left(x+y\right)$

$10x-10y=6x+6y$

$4x=16y$

+91

Live ClassesBooksTest SeriesSelf Learning

Verify OTP Code (required)