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 can do a piece of work in 10 days and B in 15 days. If they work for a day alternately A beginning the work will be completed in

A.6 days

** B.12 days**

C.8 days

D.15 days

## A train traveling at 36 km/h took 10 seconds to pass a stationary man. What was the length of the train?

A.45m

B.80m

** C.100m**

D.110m

## A train 100 meters long completely crosses a bridge 300 meters long in 45 seconds. What is the speed of the train:

9