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2/5 ----------> x
x/600 = 2/5 / 3/7
x / 600 = 2/5 x 7/3
x = 2 x 7 x 600 / 5 x 3
= 8400 / 15
= 560 m²
Jadi tempat yang digunakan untuk jogging track seluas 560 m²