It would be 4.4mm/.5 mm x 4 cm = 35.2 cm
Answer:
11/25
Step-by-step explanation:
You can divide other shapes into triangles. Then you use what you know about the similar or congruent angles/sides (depending on your question) to determine congruency/similarity between other shapes.
Speed of the boat = u
speed of the current = v
In downstream,
u - v = 280/7
u - v = 40
In upstream,
u + v = 280/14
u + v = 20
Add both equations
2u = 60
u = 30
v = -10
Speed of the boat = 30 km/h
The best way to see what is happening in both situations is to create a table showing the new elevation after each minute.
Please see the attached picture for the work.
After five minutes, both balloons will be at the same height.