A person can row 88 km downstream in 11 h, and 72 km upstream in 12 h. What is the speed of the current?

Correct option is A

Given:
Distance downstream = 88 km
Time downstream = 11 hours
Distance upstream = 72 km
Time upstream = 12 hours
Formula Used:
​$$\text{Speed}_{\text{downstream}} = \frac{\text{Distance}_{\text{downstream}}}{\text{Time}_{\text{downstream}}} \\[6pt]\text{Speed}_{\text{upstream}} = \frac{\text{Distance}_{\text{upstream}}}{\text{Time}_{\text{upstream}}}$$​​
Solution:
Speed downstream =$$\frac{88}{11}$$​ = 8 km/hr

=> Speed upstream = $$\frac{72}{12}$$​= 6 km/hr
=> Speed of the current = $$\frac{8 - 6}2$$​ = 1 km/hr