__QUANT QUIZ-7 FOR LIC –AAO EXAM__

__BOATS AND STREAM__

**1. A boat goes from point A to B 40 km downstream and return back in 12 hr. what is the speed of stream if speed of boat in still water is 12 km/hr.**

**a.**4

**b.**6

**c.**8

**d.**7 ½

**2. The difference between downstream speed and upstream speed is 3 km/hr and the total time taken during upstream and downstream is 3 hrs. What is the downstream speed, if the downstream and upstream distance are 3 km each:**

**a.**2.5 km/hr

**b.**4.33 km/hr

**c.**4 km/hr

**d.**3.3 km/hr

**3. The speed of a boat in upstream is 2/3 that of downstream. Find the ratio of speed of boat in still water and to the average speed of boat in downstream and upstream:**

**a.**

**b.**

**c.**

**d.**none of these

**4. A boat takes 5 hrs more while going back in upstream than in downstream. If the distance between two places is 24 km and the speed of boat in still water is 5.5 km/hr. What must be the speed of boat in still water so that it can row downstream24 km, in 4 hrs:**

**a.**1.5 km/hr

**b.**3.5 km/hr

**c.**4.5 km/hr

**d.**3 km/hr

**Directions (5- 6): A motor boat went downstream for 120 km and immediately returned. It took the boat 15 hrs to complete the round trip. If the speed of the river were twice as high, the trip downstream and back would take 24 hrs:**

**5. What is the speed of the boat in still water**:

**a.**20 km/hr

**b.**18 km/hr

**c.**15 km/hr

**d.**16 km/hr

**6. What is the speed of the stream:**

**a.**3.5 km/hr

**b.**4 km/hr

**c.**6 km/hr

**d.**8 km/hr

**7. A boat covers 48 km upstream and 72 km downstream in 12 hrs, while it covers 72 km upstream and 48 km downstream in 13 hrs. The speed of steam is:**

**a.**2 km/hr

**b.**2.2 km/hr

**c.**2.5 km/hr

**d.**4 km/hr

**8. The speed of a boat in still water is 20 km/hr and the rate of current is 4 km/hr .The distance travelled by the boat downstream in 30 minute is:**

**a.**8

**b.**10

**b.**12

**d.**14

**9. A man can swim 5 km/hr in still water. If the speed of current be 3 km/hr, the time taken by him to swim to a palace 16 km upstream and back is:**

**a.**8 hr

**b.**7.5 hr

**c.**6.66 hr

**d.**10 hr

**10. A man can row 5 km/hr in still water. If the rate of current is 1 km/hr, it takes**

**hrs to row to a place and back. How far is the place:**

**a.**2 km

**b.**2.5 km

**c.**3 km

**d.**4 km

**ANSWERS**

**1.C, 2.B, 3.A, 4.B, 5.B, 6.C, 7.A, 8.C, 9.D, 10.C**