Two trains start from same place at same time at right angles to each other. Their speeds are 36km/hr and 48km/hr respectively. After 30 seconds the distance between them will be ?	Choose the correct choice from the following answers.
A) 270 mts B) 190 mts C) 100 mts D) 500 mts E) 110 mts
Explanation:   Using pythagarous theorem,   distance travelled by first train = 36x5/18x30 = 300m   distance travelled by second train = 48x5/18x30 = 400m   so distance between them =âˆš( 90000 + 160000)= 
<gadget id="calculator">( 90000 + 160000)</gadget>
<output>250_000</output>
âˆš250000= 500mts.   Answer: 500 mts
<result>D</result>
Two trains start from same place at same time at right angles to each other. Their speeds are 36km/hr and 48km/hr respectively. After 30 seconds the distance between them will be ?