In a kilometer race, A beats B by 50 meters or 10 seconds. What time does A take to complete the race?
Answer: 190 sec
Explanation
Track length = 1 km
Formula used:
Distance Speed x Time
Calculation:
"A" beats "B" by 50 m or 10 sec, means "B" covers 50 m in 10 sec
Speed of "B" = 50/10 = 5 m/s
Time to cover 1000 m = 1000/5 = 200 sec
"A" beats "B" by 10 sec means
"A" reach 10 sec early
Time taken by "A" to complete the race = 200 - 10 = 190 sec
∴ Time taken by "A" to complete the race is 190 sec.
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