A baseline boat hull can row 12 km/h in still water. If the river current tracks a velocity of 4 km/h, find the exact sector distance covered downstream by the boat hull in 45 minutes flat. MCQ with Answer and Explanation

A baseline boat hull can row 12 km/h in still water. If the river current tracks a velocity of 4 km/h, find the exact sector distance covered downstream by the boat hull in 45 minutes flat.
A. 12 km
B. 10 km
C. 14 km
D. 16 km
Answer: Option A
Solution (By JKSSB Mock Tests)
Downstream speed = 12 + 4 = 16 km/h. Time = 45 minutes = 45/60 = 0.75 hours = 3/4 hour. Distance covered = Speed * Time = 16 * (3/4) = 12 km.

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Practice More Time Speed and Distance Questions

Question #1
A runner tracks a circular field of radius 140 meters. If his speed is 5 m/s, how long does he take to complete a single lap?
A. 180 seconds
B. 176 seconds
C. 160 seconds
D. 192 seconds

Correct Answer: Option B


Explanation:
Circumference = 2 * (22/7) * 140 = 880 meters. Time taken = Distance / Speed = 880 / 5 = 176 seconds.

This question belongs to: Maths Time Speed and Distance
Question #2
A train running at 90 km/h overtakes a cyclist riding at 18 km/h in the same direction in 10 seconds. Find the length of the train.
A. 220 meters
B. 200 meters
C. 180 meters
D. 240 meters

Correct Answer: Option B


Explanation:
Relative speed = 90 - 18 = 72 km/h = 72 * (5/18) = 20 m/s. Length of train = Relative speed * Time = 20 * 10 = 200 meters.

This question belongs to: Maths Time Speed and Distance
Question #3
A locomotive train 140 meters long passes a track milestone pole in 7 seconds flat. What is its speed in km/h?
A. 80 km/h
B. 72 km/h
C. 68 km/h
D. 76 km/h

Correct Answer: Option B


Explanation:
Speed of train = 140 / 7 = 20 m/s. In km/h = 20 * (18/5) = 72 km/h.

This question belongs to: Maths Time Speed and Distance