# 12 miles is approximately equal to 6 km. How many km are equal to 18 miles? How many miles are equal to 42 km?

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by ISHAKA

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by ISHAKA

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12 miles = 6 km

using unitary method

12 miles = 6 km

1 miles = 6/12 km

18 miles = 6/12 x 18 km

18 miles = 9 km

6 km = 12 miles

6 x 7 km = 12 x 7 miles

42 km = 84 miles

SO 18 miles=12miles+6miles

= 6+3

so 18 minles =9 km

42km=?(x)

by cross multiplication

18miles=9km

?(x)=42km

18×42÷9=84

so x =84 miles

84 miles =42km