# | | Question 15

On a river, C is the mid-point between two points A and B on the same bank of the river. A boat can go from A to C and back in 14 hours and from A to B in 20 hours 20 min. How long it would take to go from B to A?

**(A)** 6 h 40 m

**(B)** 6 h 50 m

**(C)** 7 h 20 m

**(D)** 7 h 40 m

**Answer:** **(D)** **Explanation:** Time required to travel from A to B = 20 hour 20 min

Time required to travel from A to C = 1/2 (20 h 20 m)

= 10 h 10 m

Given total time from A to C and C to A = 14 h

10 h 10 m + C to A = 14 h

C to A = 3 h 50 m

Time taken from B to A is twice of C to A

then, time taken from B to A =2*(3 h 50 m)=**7 h 40 m**

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