**1. Mohan can finish a job in 60 days whereas Ram can finish the same job in 20 days. If they work together, the job will be over in-**

A. 7.5 days

**B. 15 days**

C. 25 days

D. 55 days

**(1/t=1/60+1/20=1/15**

**Time =15 days)**

**2. A can type 75 pages in 25 hrs. A and B working together can type 135 pages in 27 hrs. Time needed by B to type 42 pages is-**

A. 24 hrs

B. 32 hrs

**C. 21 hrs**

D. 45 hrs

**( A can type 3 pages in 1 hr**

**A and B can together type 5 pages in 1 hr**

**B can type 2 pages in an hour. So, B needs 21 hr to type 42 pages)**

**3. X can finish a job in 12 days, Y in 18 days and Z in 9 days. If they work together, the job will be over in-**

**A. 4 days**

B. 6 days

C. 8 days

D. 9 days

**(1/t=1/12+1/18+1/9=1/4**

**Time = 4 days)**

**4. A and B working together can move a field in 28 days. With the help of C they can finish the job in 21 days. If C works all alone the time needed by him to finish the job is-**

A. 75 days

B. 67 days

C. 97 days

**D. 84 days**

**(1/a+1/b=1/28**

**1/a+1/b+1/c=1/21**

**1/c=1/21-1/28=1/84**

**Time = 84 days)**

**5. A can do a job in 24 days. B is 50% more efficient than A. Then B can finish the job in-**

**A. 12 days**

B. 24 days

C. 14 days

D. 18 days

**(B needs half the time**

**B needs 24 x ½ =12 days)**

**6. A can do twice as much work as B. If they can together finish the job in 24 days, then working alone A would have finished the job in-**

A. 54 days

B. 78 days

**C. 72 days**

D. 134 days

**(1/x+1/2x=1/24**

**3/2x=1/24**

**X = 36 days)**

**7. If A takes half as long to do a piece of work as B takes and if C does it in same time as A and B together, and if all three working together will take 7 days to complete the work then B working alone would finish the job in-**

A. 84 days

B. 43 days

C. 54 days

**D. 42 days**

**(1/c=2/x+1/x=3/x**

**1/a+1/b+1/c=2/x+1/x+3/x=6/x**

**6/x=1/7…….x=42 days)**

**8. A can do a piece of work in 8 days and B can do the same work in 12 days. A and B together complete the job and get Rs. 200 as combined wages. B’s share in the wage will be-**

A. 54 Rs

B. 67 Rs

**C. 80 Rs**

D. 90 Rs

**(A:B=1/8:1/12=12:8**

**B’s share= 8/20 ×200=80)**

**9. A,B and C together do a piece of work for Rs. 5350. A working alone could do it in 5 days, B in 6 days and C in 7 days. The share of C is-**

**A. 1500 Rs**

B. 1756 Rs

C. 1659 Rs

D. 1460 Rs

**(A:B:C=1/5:1/6:1/7=42:35:30**

**C’s share =30/107×5350=1500)**

**10. A car goes 50 km in 5 hrs. What is the speed of car in m/s?**

A. 4.225

**B. 2.777**

C. 2.857

D 5.566

**(S=d/t…..50/5 km/hr**

**=10×1000/3600=(100/36 m)/s**

**=2.777m/sec)**