Go to a nearby railway station/bus station/hospital/industry. What type of sewage is released? List out where and how.

If there are 25 railway stations on a railway line, how many types of single second class tickets must be printed, so as to enable a passenger to travel from one station to another.

If there are 30 Railway stations on a Railway line, how many number of single second class tickets must be printed so as to enable a passenger to travel from one station to another.

The parking charges of a car in Hyderabad Railway Station for first two hours is 50 and 10 for each subse quent hour. Write down an equation and draw the graph. Read the following charges from the graph: How many hours did Rekha parked if she paid 80 as parking charges?

The parking charges of a car in Hyderabad Railway station for first two hours is 50 and 10 for each subsequent hour. Write down an equation and draw the graph. Find the following charges from the graph (i) For three hours (ii) For six hours (iii) How many hours did Rekha park her car if she paid 80 as parking charges?

A train , standing at the outer signal of a railway station blows a whistle of frequency 400 Hz in still air, (i) What is thefrequency of the whistle for a platform observer when the train (a) approaches the platform with a speed of 10ms^(-1) , (b) recedes from the platform with a speed of 10 ms^(-1) ? (ii) What is the speed of sound in still air can be taken as 340 ms^(-1) .

There are 14 intermediate railway stations between Vijayawada and Hyderabad. In how many ways can a train be stopped at 3 of these stations such that no two of them are consecutive?

Sunil was unable to see the outside when he came out from the theatre. He don't know how he has come out with other audience. What type of questions he would got in his mind to know the reason?