Question

TASYA BERLARI mengelilingi lapangan yg berbentuklingkaran dengan luas 1386 m2. jika tasya berlari sebanyak 3 putaran,maka jarak lari yg ditempuh tasya sejauh...?

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Answer 1

Verified answer

Pertama kita cari dulu jari-jari lapangan tersebut

L = Π r²
1386 = 22/7 r²
1386 × 7/22 = r²
9702/22 = r²
441 = r²
r² = 441
r =√441
r = 21 m

Karena jari-jarinya sudah ketemu, kita cari kelilingnya

K = 2 Π r
= 2 × 22/7 × 21
= 2 × 22 × 3
= 44 × 3
= 132 m

Tasya mengelilingi lapangan sebanyak 3 putaran, maka :

132 m × 3 = 396 m

Semoga membantu

Answer 2

Verified answer

L = phi x r²
1386 = 22/7 x r²
r² = (1386 x 7)/22
r² = 9702/22
r² = 441
r = 21 m

Kel = 2 x 22/7 x 21
Kel = 2 x 22 x 3 = 132 m

Jarak = putaran x kel
Jarak = 3 x 132 m = 396 m