The price of 6 pencils is Rs. 30 and that of 12 pens is Rs. 120. What is the average price of 50 pencils and 50 pens?

A man sets out on a journey. He travelled for a total of 16 hours. He covered the first half of the distance at a speed of 40 km / h and the second half at 60 km / h. What is the total distance he travelled?

Two towns A and B are 170 km apart, a train starts at 9 a.m. from A towards B at a speed of 40 km/hr, at 11 a.m. another train starts from B towards A at a speed of 50 km/hr. When will the two trains meet?

Two trains 108 m and 112 m in length are running towards each other on the parallel lines at a speed of 45 km/hr and 54 km/hr respectively. To cross each other after they meet, it will take

A train 240 meters in length crosses a telegraph post in 16 seconds. The speed of the train is?

A train moves past a telegraph post and a bridge 264 m long in 8 seconds and 20 seconds respectively. What is the speed of the train? 

The average speed of a train is 20% less on the return journey than on the onward journey. The train halts for an hour at the destination station before starting on the return journey. If the total time taken for the to and from  journey is 46 hrs, covering a distance of 2000 km, the speed of the train on the return journey is:

A train of length 200 m crosses a platform of which is 50 m more than train in 18 sec. Find the speed of train.