Boats & Streams
JKSSB Assistant Training Officer (Handicrafts & Handlooms) · Numerical Ability · 8 practice questions with answers and explanations: 0 Easy, 8 Medium, 0 Hard.
Sample questions
Sample Medium question 1
A boat goes 48 km downstream and returns the same distance upstream. If the speed of the boat in still water is 15 km/h and the speed of the stream is 3 km/h, find the total time taken for the round trip.
- 6 2/3 hours
- 6 1/6 hours
- 7 2/3 hours
- 6 2/5 hours
Show answer
Answer: A. Downstream speed = 18 km/h, upstream speed = 12 km/h. Time = 48/18 + 48/12 = 6 2/3 hours.
Sample Medium question 2
A boat goes 30 km downstream and returns the same distance upstream. If the speed of the boat in still water is 14 km/h and the speed of the stream is 4 km/h, find the total time taken for the round trip.
- 5 2/3 hours
- 4 2/3 hours
- 4 2/7 hours
- 4 1/6 hours
Show answer
Answer: B. Downstream speed = 18 km/h, upstream speed = 10 km/h. Time = 30/18 + 30/10 = 4 2/3 hours.
Sample Medium question 3
A boat goes 30 km downstream and returns the same distance upstream. If the speed of the boat in still water is 8 km/h and the speed of the stream is 2 km/h, find the total time taken for the round trip.
- 9 hours
- 7 1/2 hours
- 5 hours
- 8 hours
Show answer
Answer: D. Downstream speed = 10 km/h, upstream speed = 6 km/h. Time = 30/10 + 30/6 = 8 hours.
More Numerical Ability topics for JKSSB Assistant Training Officer (Handicrafts & Handlooms)
- Average
- HCF & LCM
- Mixture & Alligation
- Number System
- Partnership
- Percentage
- Problems on Ages
- Problems on Trains
- Profit/Loss & Discount
- Ratio & Proportion
- Simple & Compound Interest
- Time & Work / Pipes & Cisterns
- Time, Speed & Distance