Answer:
0.2 × 10^-5 31.4
Step-by-step explanation:
Speed = Distance ÷ time
Speed upstream = 84 ÷ 7 = 12 km/h
Speed downstream = 84 ÷ 3 = 28 km/h
Speed in still water = 1/2(28 + 12) = 20 km/h
Answer: 20 km/h
Answer:
-4??
Step-by-step explanation:
Answer:
30/(5+7)
Step-by-step explanation: