Jawab:
Keliling lingkaran = 2πr
panjang lintasan = 5/4 x 2πr
55 cm = 5πr/2
110 cm = 5πr
πr = 110:5 = 22
r = 22/π = 22/22/7
r = 7 cm
∴ panjang jarum jam = 7 cm
Penjelasan dengan langkah-langkah:
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Jawab:
Keliling lingkaran = 2πr
panjang lintasan = 5/4 x 2πr
55 cm = 5πr/2
110 cm = 5πr
πr = 110:5 = 22
r = 22/π = 22/22/7
r = 7 cm
∴ panjang jarum jam = 7 cm
Penjelasan dengan langkah-langkah: