Ajay takes 4 hours more while swimming upstream than downstream. His speed in still water is 10 km/hr. The speed of stream is 2 km/hr. What is the distance?
Answer & explanation
Correct answer: option 1
Speed of Ajay in still water i.e. x = 10 km/hr
Speed of stream i.e. y = 2 km/hr
Upstream speed i.e. x - y = 8 km/hr Downstream speed i.e. x + y = 12 km/hr
Time = \(\frac{Distance }{ Speed}\)
\(\frac{x }{ 8}\) - \(\frac{x }{ 12}\) = 4
\(\frac{x }{ 24}\) = 4
x = 96 km