A boatman can row 9 km/h in still water and the river flows at 3 km/h. Find the time taken to row 36 km downstream. MCQ with Answer and Explanation

Question
A boatman can row 9 km/h in still water and the river flows at 3 km/h. Find the time taken to row 36 km downstream.
A. 2 hours
B. 4 hours
C. 3 hours
D. 5 hours
Answer: Option C
Solution (By JKSSB Mock Tests)
Downstream speed = 9 + 3 = 12 km/h. Time taken = Distance / Downstream Speed = 36 / 12 = 3 hours.
This question belongs to: Maths Time Speed and Distance
Request complete Subject PDF

Discuss this Question (0)

No comments yet. Be the first to start the discussion!

Practice More Time Speed and Distance Questions

Question #1
An athlete loops a regular hexagonal field of side 50 meters. If his speed is 15 km/h, find the time taken to complete one full lap.
A. 64 seconds
B. 80 seconds
C. 90 seconds
D. 72 seconds
Discuss
Get Complete Subject PDF for Maths

Correct Answer: Option D

Explanation:
Perimeter of the hexagonal field = 6 * 50 = 300 meters. Speed = 15 km/h = 15 * (5/18) = 25/6 m/s. Time = Distance / Speed = 300 / (25/6) = 300 * 6 / 25 = 12 * 6 = 72 seconds.
This question belongs to: Maths Time Speed and Distance
Question #2
A truck travels 600 meters in 40 seconds. Find its speed in km/h.
A. 54 km/h
B. 66 km/h
C. 60 km/h
D. 48 km/h
Discuss
Get Complete Subject PDF for Maths

Correct Answer: Option A

Explanation:
Speed = 600 / 40 = 15 m/s. In km/h = 15 * (18/5) = 54 km/h.
This question belongs to: Maths Time Speed and Distance
Question #3
Excluding minor platform corridor stops, the speed of an express route train is 84 km/h, and including stops it tracks at 70 km/h. How many minutes does it spend resting at stops per hour?
A. 15 minutes
B. 8 minutes
C. 12 minutes
D. 10 minutes
Discuss
Get Complete Subject PDF for Maths

Correct Answer: Option D

Explanation:
Stoppage time per hour = (84 - 70) / 84 = 14 / 84 = 1/6 hour. In minutes = (1/6) * 60 = 10 minutes.
This question belongs to: Maths Time Speed and Distance
Explore All Time Speed and Distance MCQs
Today's Top Topics
Ratio and Proportion 446 Compound Interest 571 Percentage 680 Time and Work 446 Average 965
Explore Subjects
History GK 3374 Science 4430 English 15164 Current Affairs 575 Maths 5575
Practice Mix
He is not only a good singer _____ a great dancer.
Which of the following is the primary reason for the low rainfall in the rain shadow region of the Eastern Ghats?
They ___ in the garden since this morning.
The science of measuring Earth's shape and size is called:
Which medieval historian authored 'Fatwa-i-Jahandari', a text serving as a theoretical guide on statecraft and political ideals for Muslim rulers in India?