Jarek bought new trousers, but the trousers were too long. Their length was in the ratio 5: 8 to Jarek height. Mother his trousers cut by 4 cm, thus the original ratio decreased by 4%.

Determine Jarek's high.

Correct result:

v =  160 cm


n = 5/8 v; n-4= (5/8•(1-4/100))•v

n = 5/8•v
n-4= (5/8•(1-4/100))•v

8n-5v = 0
200n-120v = 800

n = 100
v = 160

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