Question

Vreau ajutor daca se poate!!!!
1. Calculati aria dreptunghiului care are lungimea si latimea de:
a) 1,2dam, respectiv 80 dm; b) 1,5 hm, respectiv 400 mm.
2. Aflati lungimea laturii patratului care are aria egala cu:
a) 25 m patrati; b) 49 dm patrati; c) 81 cm patrati d) 64 hm patrati.
Multumesc.

Answer 1

1.a).1,2dam=120dm
A=L*l=120*80=9600dm²
b).1,5hm=150000mm
A=150000*400=60000000mm²
2.a).A=25m²
25m²=l²
l=√25=5m
b).49dm²=l²
l=√49=7dm
c).81cm²=l²⇒l=√81=9cm
d).64hm²=l²⇒l=√64=8hm