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Ravi can walk a certain distance in 40 days when he rests 9 hours a day. How long will he take to walk twice the distance, twice as fast and rest twice as long each day?
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- 80 days
- 100 days
- 90 days
- 95 days
Correct Option: B
Working hours per day= 24 – 9 = 15 hrs.
Total working hours for 40 days
= 15 × 40 = 600 hrs.
On doubling the distance, the time required becomes twice but on walking twice as fast, the time required gets halved. Therefore, the two together cancel each other with respect to time required. Increasing rest to twice reduces walking hours per day to
24 – (2 × 9) = 6 hrs.
∴ Total number of days required to cover twice the distance, at twice speed with twice the rest.
| = | = 100 days | |
| 6 |
