1. IP : L = 5l
P = 288
C : L = ? ; l = ?
Dem :
P = 2(L+l)
288 = 2(L+l)
144 = L+l
144 = 5l+l
144 = 6l
l = 144:6 = 24
L = 5×24 = 120
2. IP : L = 7l
P = 192
C : A = ?
Dem :
P = 2(L+l)
192 = 2(L+l)
96 = L+l
96 = 7l+l
96 = 8l
l = 12
L = 7×12 = 84
A = L×l = 12×84 = 1008
3. IP : P = 291,2
L = 12+l
C : L = ? ; l = ?
Dem :
P = 2(L+l)
291,2 = 2(L+l)
145,6 = 12+l+l
133,6 = 2l
l = 66,8
L = 66,8+12 = 78,8
4. IP : A = 70,8
l = 4,8
C : P = ?
Dem :
A = L×l
70,8 = 4,8×L
L = 70,8:4,8
L = 14,75
P = 2(L+l)
P = 2(14,75+4,8) = 2×19,55 = 39,1
5. IP : P = 6,04
C : A = ?
Dem :
P = 4l
6,04 = 4l
l = 6,04:4 = 1,51
A = l² = 1,51×1,51 = 2,2801
6. IP : A = 144
C : P = ?
Dem :
A = l²
144 = l²
[tex]l = \sqrt{144} [/tex]
l = 12
P = 4l
P = 4×12 = 48
7. IP : L = 7,83
l = 5,42
C : A = ? ; P = ?
Dem :
A = L×l
A = 7,83×5,42 = 42,4386
P = 2(L+l)
P = 2(7,83+5,42) = 2×13,25 = 26,5
8. IP : l = 10
L = 18
h = 5,5
C : V = ?
Dem :
V = L×l×h
V = 10×18×5,5 = 180×5,5 = 990
