Question
Two trains of same length are running in parallel tracks
in the same direction with speed 70 km/hr and 120 km/hr respectively. The latter completely crosses the former in 36 seconds. Find the length of each train (in m).Solution
When two trains cross each other, they cover distance equal to the sum of their lengths with relative speed.  Let's take length of each train = x So, total length of both trains = 2x Relative speed = (120 – 70) × (5/18) = 125/9 m/sec. ∴ Total length = Time × Relative speed ⇒  2x = (36 × 125)/9 ⇒  x = 250 m
Select the correct mirror image of the given figure when the mirror is placed to the right side of the f igure .
Select the number from among the given options that can replace the question mark (?) in the following series.
99, 123, 150, 180, 213, ?
Select the option that will come next in the following figure series.
In a certain code language, ‘SILK’ is written as ‘TIML’ and ‘INSECT’ is written as ‘IOTEDU’. How will ‘CHANGE’ be written in that la...
If in a code language, 'HOME' is written as 'LROF' and 'EYE' is written as 'HAF' and 'SO' is written as 'UP', how will 'HOUSE' be written in that language?
Seven boxes A, C, E, G, I, K, and M are kept one over the other but not necessarily in the same order. Exactly five boxes are kept between E and C. G is...
In a code language, 'VEIN' is coded as XGKP and 'BONE' is coded as DQPG. How will 'CHIN' be coded in the same language?
In a certain code language, 'ABSENCE is written as 'DWVZQXH and 'SERVICE' is written as 'VZUQLXH'. How will 'CONSENT' be written in that language?
Select the number from among the given options that can replace the question mark (?) and continue the given series.
6, 27, 128, 629, ?
Which two signs should be interchanged to make the given equation correct?
912 – 456 × 28 + 390 ÷ 2 = 444