Comprehension Passage
Direction: Study the following information and answer the following questions.
The following table shows the total distance and ratio of the downstream distance to upstream distance of 5 different boats.
| Boat | Total distance(Km) | Ratio of upstream to downstream distance |
| A | 1256 | 3 : 5 |
| B | 972 | 7 : 11 |
| C | 1120 | 39 : 31 |
| D | 840 | 13 : 17 |
| E | 975 | 13 : 12 |
The following Bar graph shows Percentage of Speed of Stream. Given Percentage is calculated on 20 km/hr.
If the ratio of the time taken by boat C in upstream to downstream is 78 : 31 then find the speed of boat C.
1
9 km/hr
2
10 km/hr
3
11 km/hr
4
12 km/hr
5
None of these