**A.20 days**

B.22 days

C.25 days

D.18 days

## Two trains are moving in opposite directions at the speed of 50 and 70 km/ph. Their lengths are 150m and 100m. The time required for their crossing is:

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**

## Two trains traveling in the same direction at 40 and 22 km/hr completely pass each other in 1 minute. If the length of the first train is 125 meters what is the length of second train.

A.125

B.150

** C.175**

D.185

## 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