bonjour,
1) V cylindre =
0,5mm = 0,05cm
V = pi*0,05²*h = 0,0025pih(cm^3)
2) V = 4/3(pi*30^3) =36000pi(cm^3)
3) 0,0025pih = 36000pi
on simplifie pi
→0,0025h = 36000
h = 36000/0,0025 = 14400000cm = 144 000m soit 144km
4) P équateur = 2*pi*6370 = 12740pi km≈40003km
294*144 = 42336km
⇒Annie a raison
