LIVE Course for free

Rated by 1 million+ students
Get app now
0 votes
21 views
in Aptitude by (30.0k points)
closed by

If the boat travels 3 km distance downstream in 12 minutes and the speed of a boat in still water in 13 km/h then what will be the rate of current (in km/h)?


1. 1
2. 2
3. 3
4. 4
5. 5

1 Answer

0 votes
by (54.3k points)
selected by
 
Best answer
Correct Answer - Option 2 : 2

Given:

Speed of boat in still water = 13 km/h

Distance = 3 km

Time taken = 12 minutes

Formulas Used:

Speed = Distance/Time

S(downstream) = S(boat) + S(stream)

Calculation:

Speed = Distance/Time

⇒ S(downstream) = (3 x 60)/12

⇒ S(downstream) = 15 km/h

S(downstream) = S(boat) + S(stream)

⇒ S(stream) = S(downstream) – S(boat)

⇒ S(stream) = 15 – 13

⇒ S(stream) = 2 km/h

The speed of stream is 2 km/h

Conversion of Time from minutes to hours

1 min = (1/60) hour 

Welcome to Sarthaks eConnect: A unique platform where students can interact with teachers/experts/students to get solutions to their queries. Students (upto class 10+2) preparing for All Government Exams, CBSE Board Exam, ICSE Board Exam, State Board Exam, JEE (Mains+Advance) and NEET can ask questions from any subject and get quick answers by subject teachers/ experts/mentors/students.

Categories

...