Correct Answer: 8 : 3
Explanation:
Then, distance covered upstream in 8 hrs 48 min = Distance covered downstream in 4 hrs.
⟹ | ❨ | x x 8 | 4 | ❩ | = (y x 4) |
5 |
⟹ | 44 | x =4y |
5 |
⟹ y = | 11 | x. |
5 |
∴ Required ratio = | ❨ | y + x | ❩ | : | ❨ | y - x | ❩ |
2 | 2 |
= | ❨ | 16x | x | 1 | ❩ | : | ❨ | 6x | x | 1 | ❩ |
5 | 2 | 5 | 2 |
= | 8 | : | 3 |
5 | 5 |
= 8 : 3.
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