Réponse :
bonjour
Explications étape par étape
5m=500 cm
0.09hm=90 dm
2530mm=2.53m
25ml=0.025l
205dl=0.205hl
0.5g=500mg
2.2kg=2200g
3m²=30000cm²
23dm²=230000mm²
0.98m³=980dm³
37cm³=0.000037m³
1l=1dm³
5dl=500cm³
5m³=5000l
20min=1200s (20x60)
3h=180 minutes (3x60)
2h=7200s(2x3600)
9384s
9384/3600=2.6067h
0.6067x60=36.402 minutes
0.402x60=24.12≈ 24 secondes
=2h36 min et 24 secondes
