Answer the 10th question and it should be right
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Let the speed of motor boat be=x km /h
Downstream =(x+1)km/h
Upstream =(x-1)km/h
Distance of downstream =4*(x+1)
Distance of upstream =5*(x-1)
4*(x+1) = 5*(x-1)
4x+4 = 5x-5
4x-5x= -5 - 4
-x= - 9
X=9km/h
Downstream =(x+1)km/h
Upstream =(x-1)km/h
Distance of downstream =4*(x+1)
Distance of upstream =5*(x-1)
4*(x+1) = 5*(x-1)
4x+4 = 5x-5
4x-5x= -5 - 4
-x= - 9
X=9km/h
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9km per hour .....................
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