Question

calculati aria unui dreptunghi in m2 cu dimensiunile de 1. 3 m si 7m 2. 31m si 25m 3. 15dam si 30m 4. 25cm si 4m 5. 125m si 42.5dm.urgeeeeeeeeeeenttttttttt va rooooooooooooooooggg!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Answer 1

1.
$arie \: dreptunghi = L \times l = 3 \times 7 \\ = 21 {m}^{2}$
2.
$arie = L \times l = 31 \times 25 = 775 {m}^{2}$
3. 15 dam=150 m
$arie = 150 \times 30 = 4500 {m}^{2}$
4. 25 cm= 0,25 m
$arie = 0.25 \times 4 = 1 {m}^{2}$
5. 42,5 dm= 4,25 m
$arie = 4.25 \times 125 = 531.25 {m}^{2}$

coroana?