(1). A and B can finish a job in 12 days, B and C can finish it in 15 days, C and A can finish it in 20 days. In how many days will they finish it in together?

• (a). 5
• (b). 10
• (c). 8
• (d). 7
• (e). None of these

(2). R and S can finish a job in 10 days, S and J can finish it in 12 days, J and R can finish it in 15 days. In how many days will it take R alone to complete the job?

• (a). 65
• (b). 45
• (c). 86
• (d). 24
• (e). None of these

(3). 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.

• (a). 32
• (b). 40
• (c). 26
• (d). 46
• (e). None of these

(4). Karishma, Vinothini and Saranya together can do a work in 12 days. They start the work and after 4 days Karishma left. Vinothini and Saranya together work and complete the work in 12 days. In how many days Karishma alone do the entire work?

• (a). 12
• (b). 14
• (c). 36
• (d). 28
• (e). None of these

(5). Two inlet tap A and B individually can fill a tank in 12 and 15 hours respectively. If these two taps are opened along with an outlet tap C, the tank gets full in 10 hours. In how much time, the outlet tap C alone can empty the full tank.

• (a). 20
• (b). 10
• (c). 6
• (d). 14
• (e). None of these

(6). A alone can do a piece of work in 6 days and B alone in 8 days. A and B undertook to do it for Rs. 3200. With the help of C, they completed the work in 3 days. How much is to be paid to C?

• (a). 200
• (b). 350
• (c). 250
• (d). 400
• (e). None of these

(7). A does 80% of a work in 20 days. He then calls in B and they together finish the remaining work in 3 days. How long B alone would take to do the whole work?

• (a). 20
• (b). 30
• (c). 37.5
• (d). 38.5
• (e). None of these

(8). A is 30% more efficient than B. How much time will they, working together, take to complete a job which A alone could have done in 23 days?

• (a). 27
• (b). 13
• (c). 15
• (d). 28
• (e). None of these

(9). Sakshi can do a piece of work in 20 days. Tanya is 25% more efficient than Sakshi. The number of days taken by Tanya to do the same piece of work is

• (a). 17
• (b). 14
• (c). 15
• (d). 16
• (e). None of these

(10). A takes twice as much time as B or thrice as much time as C to finish a piece of work. Working together, they can finish the work in 2 days. B can do the work alone in

• (a). 8
• (b). 6
• (c). 12
• (d). 16
• (e). None of these