bonjour
55 - 30 = 25
LM = 25 km
RL² = 40² + 30 ²
RL² = 2 500
RL = √ 2 500
RL = 50 km
PR/PS = PL/PM = RL/SM
30/55 = 50/ SM
SM = ( 55*50) / 30 = 91.66.....
SM ≅ 91.7 km
40/PS = 30/55
PS = 73.3.....
PS ≅ 73.4 km
40 + 50 + 25 + 91.7
= ≅ 206.7 km = 207 km arrondi unité
