Problema Solution
Sunny hill garden center sells lawn grass seeds for $2.25 a pound. It takes 1 pound of grass seed for every 150 square feet. A lawn is shaped like a trapezoid with bases of 27 and 31 feet, and the perpendicular distance between the bases is 18 feet. How much will it cost to seed this lawn?
Answer provided by our tutors
first lets find the area of the trapezoid
A = (1/2)(a + b)h
a = 27 ft
b = 31 ft
h = 18 ft
A = (1/2)(27 + 31)18
A = 522 square feet
let x = lbs seed needed for 522 square feet
1 : 150 = x : 522
by solving we find
x = 3.48 lbs
click here to see the step by step solution of the equation
since 1 lbs of seed costs $2.25 the cost of 3.45 lbs of seed is: 3.45*2.25 = $7.7625
it will cost $7.7625 to seed the lawn.