... developed alone the park use algebraic formula,find the are of the track around the park
Responses (1)
Diameter of the park
d = 2r = 28m
The radius r is then 14m.
Outside a 3.5m wide track has been built. So the radius R of the outer rim of the track is
R = (14 + 3.5)m = 17.5m.
The area a of the track is then the difference of the areas of these two circles:
a = 2π (R² - r²).
Sorry, it's of course
a = π (R² - r²).
The 2 slipped accidentally in ;)