Question

8,9,10,11 vă rog ajutați mă

Answer 1

8)A =l× L; L= 12 cm; l= 5/6×L= 5/6×12= 5×2=10 ; A = 12×10=120 cm patrati

l=14 hm; L= 3/2 ×l=3/2×14=21 hm
A = 14×21=294 hm patrati

9) a) L=0,008 km= 8 m; l= 75/100× 8= 6 m; A=6×8=48 m patrati

b) l=1,5 dam; L= 120% din l=120×1,5dam=120/100×15m= 18 m
A =15 m× 18 m= 270 m Pătrați

10) A=96 m pătrați = l×L
a) L 1, 6 dam=16 m; l=96/16=6 m
b) l = 800 cm=8 m
L=96/8=12 m


11) A=72 dm patrati = l×L
L=0,12 dam= 12 dm, l=72/12=6 dm
P= 2 ×(l×L)= 2×18=36 dm

l=420 mm=4 dm
L=A/l= 72/4==18
P=2×(4+18)=2×22=44 dm
succes!