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= 3,14 x 10
= 31,4 cm
jarak yang ditempuh roda= 31,4 x 50
= 1570cm
= 15,7m
2. luas= πr²
= 3,14 x 20²
= 3,14 x 400
= 1256cm²
3. luas= πr²
6776 = 22/7 x r²
6776 x 7/22 = r²
308 x 7 = r²
2156 = r²
√2156 = r
46,43 = r