There is a race of 1 km among K, L and M. K and L run 1 km and K wins by 10 seconds. K and M run 1 km and K wins by 200 mt. When L and M run a km, L wins by 15 seconds. What is the ratio of time taken by K and L to run a km?
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Answer:
A and B runs a kilometer and A wins by 25 seconds. A and C run a kilometer and A wins by 275 meters. When B and C runs the same distance, B wins by 30 seconds. What is the time taken by A to run a kilometer?
Rohan Sharma
Answered 1 year ago
A and B run a kilometer and A wins by 25 Seconds.
A's time = x sec
B's time = x + 25 sec
When B and C run the same distance B wins by 30 seconds.
We know B's time (from above) = x + 25 sec
If C loses by 30 sec, C's time = x + 55 sec
A = x
B = x + 25
C = x + 55
A and C run a kilometer and A wins by 275m.
It takes C 55 sec to run 275m.
275/55 = 5 ... C runs 5m/sec; = 1 km in 200 sec (3 min 20 sec)
C = x + 55; C = 200 sec,
200 sec = x + 55
145 sec = x
B = x + 25; = 170 sec (2 min 50 sec)
A = x sec = 145 sec (2 min 25 sec)
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