951. A steamer goes downstream from one port to another in 4 hours, it covers the same distance upstream in 5 hours. If the speed of the stream is 2km/hr,the distance between the two parts is_______??
A. 50km
B. 60km
C. 70km
D. 80 km

952. A and B can do a work in 8 days, 13, and C can do the same work in 12 days. A, B and C together can finish it in 6 days. A and C together will do it in_________??
A. 4 days
B. Â 6 days
C. Â 8 days
D. Â 12 days

953. A can do a certain work-in the same time in which B and C together can do it. If A and B together could do it in 10 days and C alone in 50 days, then B alone could do it in_________??
A. 15 days
B. Â 20 days
C. Â 25 days
D. Â 30 days

954. A and B can complete a work in 15 days and 10 days respectively. They started doing the work together but after 2 days B had to leave and A alone completed the remaining work. The whole work was completed in___________??
A. 8 days
B. Â 10 days
C. Â 12 days
D. Â 15 days

955. A and B can do a piece of work in 72 days; B and C can do it in 120 days; A and C can do it in 90 days. In what time can A alone do it ??
A. 80 days
B. Â 100 days
C. Â 120 days
D. Â 150 days

956. Twenty women can do a work in sixteen days. Sixteen men can complete the same work in fifteen days. What is the ratio between the capacity of a man and a woman ??
A. 3 : 4
B. Â 4 : 3
C. Â 5 : 3

957. X and Y can do a piece of work in 20 days and 12 days respectively. X started the work alone and then after 4 days Y joined him till the completion of the work. How long did the work last ??
A. 6 days
B. Â 10 days
C. Â 15 days
D. Â 20 days

958. A and B together can complete a work in 1.2 days,. A alone can complete it in 20 days. If B does the work only for half a day daily, then in how many days A and B together will complete the work ??
A. 10 days
B. Â 11 days
C. Â 15 days
D. Â 20 days

959. A, B and C can do a piece of work in 20, 30 and 60 days respectively. In how many days can A do the work if he is assisted by B and C on every Third day ??
A. 12 days
B. Â 15 days
C. Â 16 days
D. Â 18 days

960. The time taken by a man to row his boat upstream is twice the time taken by him to row the same distance downstream. If the speed of the boat in still water is 42 kmph, find the speed of the stream??
A. 12 kmph
B. 13 kmph
C. 14 kmph
D. 15 kmph