Question

A boat goes 6 km an hour in still water, it takes thrice as much time in going the same distance against the current comparison to the direction of the current. Find the speed of the current

Answer 1

Answer:

Let the speed of the current be y kmph.

∴ speed of boat = 6 kmph.

According to the question,

6

= 3

6 - y

⇒ 18 – 3y = 6

⇒ 3y = 18 – 6 ⇒ 3y = 12

⇒ y =

12

= 4kmph

3

We can find the required answer with the help of given formula :

Here, Speed of boat = 6 km/hr

t1 = 3k, t2 = k

Speed of Boat

=

t1 + t2

Speed of Stream t1 - t2

6

=

3k + k

Speed of Stream 3k - k

Speed of current = 3 km/hr