Question
Walking at `5/6` of its usual speed , a train is 10 minutes to late . Find is usual time to cover the journey .
Answer: Option A
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New speed = `5/6` of the usual speed.
`:.` New time taken = `6/5` of the usual time
so, ( `6/5` of the usual time) - (usual time) = 10 min.
`rArr 1/5` of the usual time = 10 min. `rArr ` usual time = 50 min.
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