A train leaves station A towards station B,24 km away and has to reach B in half an hour .if travels at 45 km/hr for the forst quarter of an hour ,at what speed must it run for the rest of the journey.
A car leaves the starting point at 11:00 a.m. travelling at 60 km/hr . Another car leaves the starting point at 2:00 p.m. travelling in the same direction at 65 km/hr. When will the second car overtake the first.
white and black Birds r sitting in a telephone wire.At least one from white and one from black.Color must repeat after every 4 and 7 birds. What is the max no of arrangement.
There r some balls of five different colors in a box. 10 of each color. How many balls u have to take out to ensure that there r atleast 3 balls of the color.
there is a slowrun express tht runs btw bangalore & mum bai...it starts at 10.00pm & reaches destination @ 11.30 pm 3 days later...the train is operated on all days...if the train starts from bangalore , how many other slowrun expresses will it meet on the way..b4 reaching mumbai....???