______________ is concerned with the relationship of living things and their environment.
The correct answer is A
A train whose speed is 40 m/s crosses a bridge in 20 seconds. Another train which is 80m shorter than the first train crosses the same bridge at the spe...
A train 480 metre long takes 36 sec to cross a man running at a speed of 7 km/hr in the direction same to that of train. What is the speed of the train?
Two cars start from a place with a speed of 65 km/hr at an interval of 15 minutes. A man coming from the opposite direction towards the place meets the ...
Speed of train A and train B is 90 km/hr and 36 km/hr respectively. They cross each other in 10 seconds when they are running in opposite directions. Le...
Train P travelling at 62 km/hr crosses another train Q, having three fourth of its length and travelling in opposite direction at 28 km/hr in 14 seconds...
A train started from station P and preceded towards station Q at a speed of 98 km/h. 30 minutes later, another train started from station Q and preceded...
Two cars start from a place with a speed of 60 km/hr at an interval of 15 minutes. What is the speed of a man coming from the opposite direction towards...
Train A running at speed of 144 km/hr crosses a platform having twice the length of train in 24 sec. Train B whose length is 800m crosses same platform ...
Time is taken by two trains running in opposite directions to cross a man standing on the platform in 31 seconds and 19 seconds respectively. It took 24...
A train can cross a pole in 33 seconds. While if the train increased its speed by 40% then time taken by it to cross 387 metres long platform is 42 seco...
