27 solid iron spheres,each of radius x cm are melted to form a sphere with radius y cm ,find the ratio of x:y
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First, make 6 1/3 a improper fraction: 
. Now we have 19/3*7/3: 
.
first off, let's convert the mixed fraction to improper fraction and then proceed, let's notice that by PEMDAS or order of operations, the multiplication is done first, and then any sums.