The supreme court ordered the Delhi Government to take measures to switch over all the public transport to CNG operated.
What is CNG?

The supreme court ordered the Delhi Government to take measures to switch over all the public transport to CNG operated. Why is it preferred to diesel or petrol?

Name the city in our country where the entire public road transport runs on CNG.

A factory manufactures two types of screws, A and B. Each type of screw requires the use of two machines, an automatic and a hand operated. It takes 4 minutes on the automatic and 6 minutes on hand operated machines to manufacture a package of screws A, while it takes 6 minutes on automatic and 3 minutes on the hand operated machines to manufacture a package of screws B. Each machine is available for at the most 4 hours on any day. The manufacturer can sell a package of screws A at a profit of Rs 7 and screws B at a profit of Rs 10. Assuming that he can sell all the screws he manufactures, how many packages of each type should the factory owner produce in a day in order to maximise his profit? Determine the maximum profit

By the end of 2002 ,the public transport of Delhi switched over to a new fuel. Name the fuel. Why is this fuel considered better? Explain.

Three boys step off together from the same spot. Their steps measure 63 cm, 70 cm and 77 cm respectively. What is the minimum distance each should cover so that all can over the distance in complete steps ?