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Hema ran a race in 109 seconds. She ran 12 seconds faster than Chandni. How long did Chandni take to run the race?
- a)1 minute 37 seconds
- b)1 minutes 39 seconds
- c)1 minute 42 seconds
- d)2 minutes 1 second
Correct answer is option 'D'. Can you explain this answer?
Most Upvoted Answer
Hema ran a race in 109 seconds. She ran 12 seconds faster than Chandni...
No. of seconds Hema took to run the race = 109 seconds = 12 seconds faster than that of Chandni ∴ The time taken by Chandni to run the race = (109 + 12) seconds = 121 seconds = 2 minutes 1 second (Since 60 seconds = 1 minute.)
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Hema ran a race in 109 seconds. She ran 12 seconds faster than Chandni...
Given: Hema ran a race in 109 seconds. She ran 12 seconds faster than Chandni.
To find: How long did Chandni take to run the race?
Let's assume Chandni took x seconds to run the race.
According to the question, Hema ran 12 seconds faster than Chandni.
So, the time taken by Hema to run the race = x - 12 seconds
But we know that Hema took 109 seconds to run the race.
Therefore, x - 12 = 109
Solving the above equation, we get:
x = 109 + 12
x = 121 seconds
Therefore, Chandni took 121 seconds to run the race.
Hence, the correct answer is option 'D' - 2 minutes 1 second.
To find: How long did Chandni take to run the race?
Let's assume Chandni took x seconds to run the race.
According to the question, Hema ran 12 seconds faster than Chandni.
So, the time taken by Hema to run the race = x - 12 seconds
But we know that Hema took 109 seconds to run the race.
Therefore, x - 12 = 109
Solving the above equation, we get:
x = 109 + 12
x = 121 seconds
Therefore, Chandni took 121 seconds to run the race.
Hence, the correct answer is option 'D' - 2 minutes 1 second.
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