Amar and Prem run a 100 metre race, where Amar beats Prem by 10 metres. To do a favour to Prem, Amar starts 10 metres behind the starting line in a second 100 metre race. They both run at their earlier speeds. Which of the following is true in connection with the second race?
Answers
Explanation:In a 100 m race, when Karan covers 100 metres, Arjun covers (100 – 10) = 90 metres.
⇒ Speed of Karan : Speed of Arjun = 100:90 = 10:9
In second 100 m race, now Karan has to cover 110 metres to finish the race.
Since speeds are constant, when Karan will cover a distance of 110 m (10 × 11), Arjun covers a distance of 9 × 11 = 99 m
⇒ Karan still beats Arjun by (100 – 99) = 1 metre.
Answer:
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Step-by-step explanation:
=> In a 100 m race,
when
=> Karan covers 100 metres, Arjun covers (100 – 10) = 90 metres.
⇒ Speed of Karan : Speed of Arjun =
100:90 = 10:9
=> In second 100 m race,
=> now Karan has to cover 110 metres to finish the race.
=> Since speeds are constant,
=> when Karan will cover a distance of 110 m (10 × 11),
=> Arjun covers a distance of 9 × 11 = 99 m
⇒ Karan still beats Arjun by (100 – 99) = 1 metre.
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