Quantitative Aptitude Set -626
Jun 19 2025
Here we are providing new series of Quantitative Aptitude Questions for upcoming exams, so the aspirants can practice it on a daily basis.
1) The ratio of the upstream speed and the downstream speed of the boat driven by Ram is 3: 5. If Ram can cover 25km downstream and 30km upstream in 7.5 hours, find
A.2 kmph
B.4 kmph
C.6 kmph
D.8 kmph
E.None of these
2) Ratio of the speed of boat in still water to current is 5:4. The total time taken by the boat covers 300 km against stream and 432 km along with stream in 58 hours. Find the speed of current?
A.8 kmph
B.12 kmph
C.16 kmph
D.20 kmph
E.24 kmph
3) The speed of the stream is 5 kmph. The boat A covers 96 km along with stream in 6 hours and the boat B covers 120 km along with stream in 8 hours. What is the total time taken by boat A and B covers 180 km against stream?
A.66 hours
B.68 hours
C.70 hours
D.64 hours
E.72 hours
4) A boat covers d km downstream in 9 hours and the same boat covers the same distance by upstream in 13.5 hours. If the speed of current is 5 kmph, then find the speed of boat in still water?
A.30 kmph
B.20 kmph
C.15 kmph
D.25 kmph
E.None of these
5) A boat travels at a distance of 84 km upstream in 7 hours. If the ratio of the speed of boat in downstream is 25% more than the speed of boat in still water, then what is the distance covered by the boat along with stream in 6 hours?
A.120 km
B.150 km
C.180 km
D.90 km
E.210 km
Answers :
1) Answer: D
Downstream Speed = 5x and Upstream speed = 3x
25/5x + 30/3x = 7.5
=> x = 2
Speed of the boat in still water = ½ * (Downstream speed + Upstream speed)
= ½ * (5x + 3x) = (8*2)/2 = 8kmph
2) Answer: E
300/(5x – 4x) + 432/(5x + 4x) = 58
2700 + 432 = 58 * 9x
x = 6
Speed of current = 4 * 6 = 24 kmph
3) Answer: A
Downstream speed of boat A = 96/6 = 16 kmph
Downstream speed of boat B = 120/8 = 15 kmph
Speed of boat A = 16 – 5 = 11 kmph
Speed of boat B = 15 – 5 = 10 kmph
Required time = 180/(11 – 5) + 180/(10 – 5)
= 66 hours
4) Answer: D
Speed of downstream = d/9
Speed of upstream = d/13.5
(x + 5) * 9 = (x – 5) * 13.5
9x + 45 = 13.5x – 67.5
x = 25 kmph
5) Answer: A
Upstream speed = 84/7 = 12 kmph
Speed of boat = x
Speed of current = y
x – y = 12
x + y = 125/100 * x
4x + 4y = 5x
x/y = 4/1
4k – k = 12
k = 4
Speed of downstream = 4 * 4 + 4 = 20 kmph
Required distance = 6 * 20 = 120 km
