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
Nine persons went to a hotel for taking their meal. Eight of them spent Rs. 12 each over their meal and the ninth spent Rs 8 more than the average expenditure of all the nine. Total money spent by them was:
1) Rs. 104
2) Rs. 105
3) Rs. 116
4) Rs. 117
