Friday, August 2, 2013

distance and speed



A train crosses a 160 metres bridge in 15 secs, and another 200 metres bridge in 18 secs. What is the length of the train?

distance and speed



A train is running at 72 km/hr. In how many seconds will it cross a man running in the opposite direction at 18 km/hr if the length of the train is 200 metres?

distance and speed



How many seconds will a train 440 metres long, running at 72 km/hr take to cross a telegraph post? 

speed and distance



How many seconds will a train 200 metres long running at 72 km/hr takes to cross a platform of 180 metres length?

17-quadratic equation

SERIES




Fill in the missing numbers:
2, 4, 4, 9, 6, 16, -------


WHAT WILL BE THE ANSWER

series



Fill in the missing numbers:

1,2,6, 24, -------




Answer:

1                              2                              6                              24                           -----

                              1x 2                        1x2x3                    1x2x3x4                1x2x3x4x5

Therefore, answer = 120

series



Fill in the missing numbers:

5,11, 17,----33, 43





Answer:

5                              11                           17                   ----                         33                           43

        (5 + 17) / 2 = 11                                 (11+ x)/2 = 17        (23 + 43)/2 = 33
                                                                       x = 23                                                   
Therefore, 23  Answer