Answer:
simple even tho im in 6th grade it would be over $100
R = speed in still water
r + c = speed with current
r - c = speed against current
3.5(r + c) = 70
r + c = 20
c = 20 - r
4(r + c) = distance from pier to pier
5(r - c) = distance from pier to pier
4(r + c) = 5(r - c)
4(r + 20 - r) = 5(r - 20 + r)
80 = 10r - 100
180 = 10r
18 = r
The speed in still water is 18 km/hour
Answer:
9ft
Step-by-step explanation:
The area is 135ft and the formula for area is length x width.
on the image it shows the height is 5yds and we want feet since that's that the area is in. a yard = 3 feet so its 3 x 5 = 15.
since the formula to find area is multiplication, use division to find a number in the equation. so
135 divided by 15 = 9.
The length of the base is 9ft.
