The pic is a little blury?????
2mm : 25'
half of the above
1mm : 25'/2 = 12.5'
13/12 is the answer in simplest fraction form.
I think he weighs 461.7 but I would check that
D=rt
r=(boatrate+riverrate)=(x+2)mph
d=528ft=528/5280mi=1/10mi
t=1/3hr
remember to keep the same units
so
1/10=(x+2)(1/3)
times both sides by 3
3/10=x+2
minus 2 or 20/10
-17/10=x
-1.7=x
it would be going -1.7mph (means going backwards)
