The speed indices of two sprinters are in the ratio 3 : 4. If the first sprinter requires 24 seconds to wrap up a bend, how much time does the second sprinter require? MCQ with Answer and Explanation
The speed indices of two sprinters are in the ratio 3 : 4. If the first sprinter requires 24 seconds to wrap up a bend, how much time does the second sprinter require?
A. 20 seconds
B. 22 seconds
C. 18 seconds
D. 16 seconds
Answer: Option C
Solution (By JKSSB Mock Tests)
Ratio of speeds = 3:4, so ratio of times required = 4:3. Given 4 parts = 24 seconds => 1 part = 6 seconds. Time for the second sprinter = 3 parts = 3 * 6 = 18 seconds.
Two trains 150 meters and 100 meters long are running along parallel tracks in the same direction at speeds of 56 km/h and 46 km/h respectively. In what time will the faster train cross the slower train completely?
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