Joe can buy a pair of canvas shoes for $7 or a pair of leather shoes for $35. at these prices, what is the ratio of the cost of 6 pairs of canvas shoes to the cost of 3 pairs of leather shoes? a. 1/10 b. 1/5 c. 2/5 d. 2/15 e. 3/10

1 pair of canvas is $7, therefore
6 pairs of canvas will be $ 42. while 
1 pair of leather shoe is $35, thus
3 pairs of leather shoes is $105 
Hence the ratio of the cost of canvas shoes to that of leather shoe will be;
$42 : $105 (simplifying)
= 6 :15
= 2: 5; therefore the ratio is 2/15