# Numerical Ability for SBI Clerk Prelims Exam 2018 (Boat and Stream)

**Dear Students,**

**Numerical Ability for SBI Clerk Prelims 2018**

**Numerical Ability**Section has given

**heebie-jeebies**to the aspirants when they appear for a banking examination. As the level of every other section is only getting complex and convoluted, there is no doubt that this section, too, makes your blood run cold. The questions asked in this section are calculative and very time-consuming. But once dealt with proper strategy, speed and accuracy, this section can get you the maximum marks in the examination. Following is the

**Boat and Stream quiz**on Numerical Ability to help you practice with the best of latest pattern questions.

**Q1. A boat running downstream covers a distance of 16 km in 2 hours while for covering the same distance upstream, it takes 4 hours. What is the speed of the boat in still water?**

(a) 4 kmph

(b) 6 kmph

(c) 8 kmph

(d) 12 kmph

(e) 10 kmph

**Q2. A man’s speed with the current is 15 kmph and the speed of the current is 2.5 kmph. The man’s speed against the current is:**

(a) 8.5 kmph

(b) 9 kmph

(c) 10 kmph

(d) 12.5 kmph

(e) 14 kmph

**Q3. A man can row at 5 kmph in still water. If the velocity of current is 1 kmph and it takes him 1 hour to row to a place and come back, how far is the place?**

(a) 2.4 km

(b) 2.5 km

(c) 3 km

(d) 3.6 km

(e) 4.6 km

**Q4. A man can row against the current three fourth of a kilometer in 15 min and returns same distance in 10 min, then ratio of his speed to that of current is:**

(a) 3 : 5

(b) 5 : 3

(c) 1 : 5

(d) 5 : 1

(e) 4 : 1

**Q5. If the speed of a swimmer in still water is 9 kmph. Find the downstream speed of the swimmer, when the river is flowing with the speed of 6 kmph.**

(a) 15 kmph

(b) 18 kmph

(c) 3 kmph

(d) 12 kmph

(e) 10 kmph

**Solutions (1-5):****Q6. A man can row 6 kmph in still water. If the speed of the current is 2 kmph, it takes 3 hours more in upstream than in the downstream for the same distance. The distance is:**

(a) 30 km

(b) 24 km

(c) 20 km

(d) 32 km

(e) 28 km

**Q7. A boat takes 9 hr to travel a distance upstream and takes 3 hr to travel the same distance downstream. If the speed of the boat in still water is 4 kmph, then what is the velocity of the stream?**

(a) 4 kmph

(b) 3 kmph

(c) 6 kmph

(d) 2 kmph

(e) 8 kmph

**Q8. A boat has to travel upstream 20 km distance from point X of a river to point Y. The total time taken by boat in travelling from point X to Y and Y to X is 41 min 40 s. What is the speed of the boat?**

(a) 66 kmph

(b) 72 kmph

(c) 48 kmph

(d) Cannot be determined

(e) None of these

**Q9. A steamer goes downstream from one port to another in 4 hr. It covers the same distance upstream in 5 hr. If the speed of the stream is 2 kmph, then find the distance between the two ports.**

(a) 80 km

(b) 60 km

(c) 70 km

(d) 50 km

(e) 75 km

**Q10. A boat running upstream takes 528 min to cover a certain distance, while it takes 240 min to cover the same distance running downstream. What is the ratio between the speed of the boat and speed of the water current respectively?**

(a) 2 : 1

(b) 3 : 2

(c) 8 : 3

(d) 3 : 8

(e) 5 : 9

**Solutions (6-10):****Q11. The ratio of speeds of a motorboat to that of the current of water is 36 : 5. The motorboat goes along with the current in 5 hours 10 min. Find the time taken by motorboat to come back.**

(a) 5 hours 50 min

(b) 6 hours

(c) 6 hours 50 min

(d) 12 hours 10 min

(e) None of these

**Q12. Ishwar is rowing a boat. He takes half time in moving a certain distance downstream than upstream. What is the ratio of the rate of boat in still water to the rate of current?**

(a) 2 : 1

(b) 5 : 1

(c) 7 : 1

(d) 3 : 1

(e) 1 : 3

**Q13. Kamal can row a certain distance downstream in 12 hours and can return the same distance in 18 hours. If the stream flows at the rate of 6 kmph, then find the speed of Kamal in still water.**

(a) 30 kmph

(b) 35 kmph

(c) 28 kmph

(d) 25 kmph

(e) 22 kmph

**Q14. A boatman rows 1 km in 5 min along the stream and 6 km in 1 hours against the stream. The speed of the stream is:**

(a) 3 kmph

(b) 6 kmph

(c) 10 kmph

(d) 12 kmph

(e) 14 kmph

**Q15. Sameer can row a certain distance downstream in 24 hours and can come back covering the same distance in 36 hours. If the stream flows at the rate of 12 kmph, find the speed of Sameer in still water.**

(a) 30 kmph

(b) 15 kmph

(c) 40 kmph

(d) 60 kmph

(e) 50 kmph