If it cost $200 to stain a desk measuring 4m by 5m, what would it cost to stain a desk 5m by 7m?
1 Answer
May 13, 2018
Explanation:
#"the cost is dependent on the area of the surface"#
#rArr"area "=4xx5=20" m"^2" and "5xx7=35" m"^2#
#"using "color(blue)"proportion"#
#20" m"^2to$200#
#35" m"^2to$200xx35/20=$350#
