A.5 seconds

** B.7.5 seconds**

C.40 seconds

D.none

## 20 men or 30 boys can do a certain job in 20 days. How long will it take 6 men and 15 boys to do the same job?

**A.25 days**

B.10 days

C.8 days

D.6 days

## M and N working separately can complete a job in 6 and 12 hours respectively. If they work for an hour alternately M starting at 10:00 AM when will the job be done?

A.2:00 PM

B.8:00 PM

C.7:00 PM

**D.6:00 PM**

## 30 men can do a certain work in 15 days. They started working on the project but 5 of them leave after every five days. In how many days will the work be completed now?

**A.20 days**

B.22 days

C.25 days

D.18 days

## A train traveling at 30 mph is stopped 1

A.1:01

** B.1:03**

C.1:04

D.1:45

## A tank can be filled by tap A in 16 hrs and by tap B in 20 hrs. Both the taps are kept opened for 8 hrs and then A is closed. In how many more hours will the tank be completely filled?

**A.2 hrs**

B.12 2?3

C.10 hrs

D.0.5 hrs

## A train covers a distance of 30 km at a speed of 40 km/h and another 30 km/h at the speed of 20 km/h. What is the average speed:

A.32

B.30

C.25

**D.none**