Question #f9048

1 Answer
Archish R.
Nov 16, 2017

speed of still boat: #13/2=6.5 mph#

speed of current: #3/2=1.5mph#

Explanation:

Let #s_b# be the speed of the boat in still water
Let #s_c# be the speed of the current

#s_b-s_c=20/4=5#
#s_b+s_c=32/4=8#

#=>2s_b=13#

#=>s_b=13/2=6.5 mph#

#=>s_c=8-6.5=1.5mph#

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