Comprehension Passage
Direction: Read the following information and answer the questions given below:
The line graph shown the time taken by five pipes A, B, C, D, E to fill a tank 'X' alone respectively. The efficiency of all the pipes is the same every time.
The pipe A and B can fill tank 'Y' in (k + 20) hours, while pipe C and D can fill the same tank in (k + 10) hours. In how many hours C can fill the tank alone?
1
280 hours
2
250 hours
3
140 hours
4
150 hours
5
None of these