6)
K = 2(p+l)
50 = 2(p + 10)
50 = 2p + 20
30 = 2p
p = 15 cm
L = p × l
L = 15 × 10
L = 150 cm^2
7)
L = 1/2 × a × t
40 = 1/2 × a × 8
40 = 4a
a = 10 cm
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6)
K = 2(p+l)
50 = 2(p + 10)
50 = 2p + 20
30 = 2p
p = 15 cm
L = p × l
L = 15 × 10
L = 150 cm^2
7)
L = 1/2 × a × t
40 = 1/2 × a × 8
40 = 4a
a = 10 cm