Factor out the coefficient of 1/2d+6
2 answers:
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Answer: The rate of boat is 60 kmh.
The rate of current is 5 kmh.
Step-by-step explanation:
Alright, lets get started.
Suppose the rate of boat in still water is : b kmh
Suppose the rate of current is : c kmh
When the boat is going upstream, the relative speed will be :
When the boat is going downstream, the relative speed will be:
Boat travels 220 kilometers in 4 hours going upstream.
.................. equation (1)
It travels 260 kilometers going downstream in the same amount of time.
................... equation (2)
Adding equation 1 and 2
Plugging the value of b as 60 in equation 2
Hence the rate of boat is 60 kmh.
Hence the rate of current is 5 kmh.
Hope it will help :)