A can walk a certain distance in 20 days when he rests 8 hours a day How long will he take to walk t...........

Quantitative Aptitude ( CCS) Time & distance

A can walk a certain distance in 20 days when he rests 8 hours a day. How long will he take to walk twice the distance, twice as fast and rests twice as long each day ?

40 days

60 days

80 days

100 days

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Explanation:

Working hours per day = 24 – 8 = 16 hours
Total working time = 16 × 20 = 320 hours
Distance is doubled and speed too.
Working hours per day = 24 – 16 = 8 hours
∴ Required time
= 320/8 = 40 days