Question
A train crosses a 300-metre-long bridge in 20 seconds,
and the same train crosses a tunnel twice the length of the bridge in 35 seconds. Find the speed of train in km/h.Solution
Let the length and speed of train be ‘l’ metres and ‘x’ m/s, respectively.
Then, according to question,
(l + 300)/20 = (l + 600)/35
7l + 2100 = 4l + 2400
3l = 300
l = 100 metres
x = (l + 300)/20 = 400/20 = 20 m/s = 20×(18/5) = 72 km/h
Select the option that is related to the fifth number in the same way as the second number is related to the first number and the fourth number is relat...
Select the option that is related to the third word in the same way as the second word is related to the first word.
Joy: Delight :: Barrier: ?
Select the option that is related to the third term in the same way as the second term is related to first term and the sixth term is related to the fif...
Dog : Bitch : : Drone : ?
Select the set in which the numbers are related in the same way as are the numbers of the following sets.
(NOTE : Operations should be performed ...
Select the option that is related to third number-cluster in the same way first and fifth number-cluster is related to second and sixth number-cluster....
- If 521 = 64 , 8423 = 289 , 716 = 196 , then 345 = ?
Select the set of letters that when sequentially placed in the blanks of the given letter series will complete the series.
_ x y _ w _ y z w x _ _ w _ _ z
Cobbler : Leather: : Weaver : ?
Select the option that is related to third letter cluster in the same way as second letter cluster is related to first letter cluster.
CAT: JHA:: PUG: ?
