On Thursday difference between time taken by the boat to cover lsquo X rsquo km upstream and X 120 k...........

Quantitative Aptitude ( CCS) Data Table

Direction : Study the following table to answer the questions that follow. Some values are missing. Study the table carefully and answer the questions based on data in table and particular questions.

On Thursday, difference between time taken by the boat to cover ‘X’ km upstream and (X+120) km downstream is 26 hours. Had the boat covered same distance upstream as downstream, what would be the difference in time taken then?

58 hours

62 hours

48 hours

56 hours

64 hours

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Explanation:

Downstream speed = 11+7 = 18 km/hr
Upstream speed = 11-7 = 4 km/hr
X/4 – (X+120)/18 = 26
Solve, X = 168 km = Upstream distance
Downstream distance = 168+120 = 288 km
Required time now = 288/4 – 288/18 = 56 hours

Hence, option 4 is the correct answer.