The ratio of the speed of the sprinter before and after coaching was 10:11. If he now takes 20
seconds to cover 132 meters, how long would he have taken earlier to cover double the distance?
Answers
Given : The ratio of the speed of sprinter before and after coaching was 10:11.
he now takes 20 seconds to cover 132 meters
To Find : how long would he have taken earlier to cover double the distance
Solution:
Distance = speed * time
takes 20 seconds to cover 132 meters
=> Speed = 132/20
=> Speed = 66/10 m/s
ratio of the speed before and after coaching was 10:11
Before coaching = 10x m/s
Then after coaching = 11x m/s
11x = 66/10
=> x = 6/10
=> 10x = 6
Speed before coaching = 6 m/s
Distance = 2 * 132 = 264 m
Time Taken = 264/6 = 44 secs
He has Taken 44 secs earlier to cover double the distance
Correct option is 44 secs
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Answer:
60 sec
Explanation:
Given: The ratio of the speed of sprinter before and
after coaching was 10:11.
he now takes 20 seconds to cover 132 meters
To Find: how long would he have taken earlier to
cover double the distance
Solution:
Distance =speed^ * time
takes 20 seconds to cover 132 meters
Rightarrow Speed = 132/20
=> Speed = 66/10 m/s
ratio of the speed before and after coaching was
10:11
Before coaching = 10xm / s
Then after coaching = 11x m/s
11x = 66/10
=> x = 6/10
=> 10x = 6
Speed before coaching = 6m / s
Distance =2^ * 132 = 264m
Time Taken = 264/6 = 44 secs
He has Taken 44 secs earlier to cover double the
distance
Correct option is 44 secs
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