What is the difference between average time taken by all the boat to cover their respective distance...........

Quantitative Aptitude ( CCS) Data Table

Direction : Study the following Table and answer the questions that follow:

Boats	Speed of Boats (In km/hr)	Speed of Stream (In km/hr)	% Distance travelled (Total Distance = 2000km)
A	22	14	25%
B	26	10	15%
C	30	14	20%
D	21	13	18%
E	24	8	22%

What is the difference between average time taken by all the boat to cover their respective distances in upstream to the boat B to travel 1152 km in downstream (approx.)

3.56 hour

2.08 hour

1.58 hour

None of these

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Explanation:

Speed = Distance / Time
Time taken by boat A (upstream) = 500/8 = 125/2 hours
Time taken by boat B (upstream) = 300/16 = 75/4 hours
Time taken by boat C (upstream) = 400/15 = 80/3 hours
Time taken by boat D (upstream) = 360/8 = 45 hours
Time taken by boat E (upstream) = 440/16 = 55/2 hours
After adding all the times we get
= 180.41 hours (approx)
Average Time = 180.41 / 5
= 36.08 hour (approx)
Time taken by boat B to cover 1152km (downstream) = 1152 / 36
= 32 hours
Difference in time = 36.08 – 32 = 4.08 hours (approx)

Hence, option 4 is the correct answer.