the speed of the boat in still water is 15 km/hr . it can go 30 km upstream and return downstream to the original point in 4 hours 30 minutes .find the speed of the stream
the speed of the boat in still water is 15 km/hr . it can go 30 km upstream and return downstream to the original point in 4 hours 30 minutes .find the speed of the stream
Sign Up to our social questions and Answers Engine to ask questions, answer people’s questions, and connect with other people.
Login to our social questions & Answers Engine to ask questions answer people’s questions & connect with other people.
Hey there!
Let speed of stream = x km/h
∴ Downstream speed = (15+x) km/h
∴ Upstream speed = (15-x) km/h
∴ 30/(15+x) + 30/(15-x) = 4 1/2
→ 900/225-x² = 9/2
→ 9x² = 225
→ x² = 25
→ x = 5
∴ Speed of stream = 5 km/h
Hope it Helps You!