Bunuel wrote:
A carpet is y yards long and f feet wide. How many dollars will it cost if the carpet sells for x cents per square foot? (1 yard = 3 feet)
(A) xyf
(B) 3xyf
(C) xyf/3
(D) 0.03yf/x
(E) 0.03xyf
IMO E.
This is a conversion problem and the conversion factor is given - 1 yard is equal to 3 feet.
length of carpet = y yards = 3y feet.
width = f feet.
area = length * wight = 3yf square feet.
rate of carpet = x cents per square feet.
cost ( in cents ) = 3xyf
this is the trap option! We are asked cost in dollars not cents... so we need to apply the implicit conversion of 100 cents a dollarcost ( in dollars ) = 3xyf / 100 or 0.03xyf.
Hence Option E.
Best,
Gladi
_________________
Regards,
Gladi
“Do. Or do not. There is no try.” - Yoda (The Empire Strikes Back)