Three numbers are in the ratio 2 : 7 : 5. If the smallest number is doubled and added to the largest number the result is 132. What is the middle number?
(1) 5
(2) 25
(3) 75
(4) 60
A and B can separately do a piece of work in 20 and 15 days respectively. They worked together for 6 days, after which B was replaced by C. If the work was finished in next 4 days, then the number 'of days in which C alone could do the work will be :
1) 60
2) 50
3) 35
4) 40
