Difference between revisions of "2003 AMC 10B Problems/Problem 5"

Revision as of 10:42, 22 February 2012

Problem

Moe uses a mower to cut his rectangular $90$ -foot by $150$ -foot lawn. The swath he cuts is $28$ inches wide, but he overlaps each cut by $4$ inches to make sure that no grass is missed. He walks at the rate of $5000$ feet per hour while pushing the mower. Which of the following is closest to the number of hours it will take Moe to mow the lawn.

$\textbf{(A) } 0.75 \qquad\textbf{(B) } 0.8 \qquad\textbf{(C) } 1.35 \qquad\textbf{(D) } 1.5 \qquad\textbf{(E) } 3$

Solution

Since the swath Moe actually mows is $2$ feet wide, he mows $10000$ square feet in one hour. His lawn has an area of $13500$ , so it will take Moe $1.35$ hours to finish mowing the lawn. Thus the answer is $\boxed{\textbf{(C) } 1.35}$ .

2003 AMC 10B (Problems • Answer Key • Resources)
Preceded by Problem 4	Followed by Problem 6
1 • 2 • 3 • 4 • 5 • 6 • 7 • 8 • 9 • 10 • 11 • 12 • 13 • 14 • 15 • 16 • 17 • 18 • 19 • 20 • 21 • 22 • 23 • 24 • 25
All AMC 10 Problems and Solutions

@@ Line 7: / Line 7: @@
 ==Solution==
-Since the swathe Moe actually mows is <math>2</math> feet wide, he mows <math>10000</math> square feet in one hour. His lawn has an area of <math>13500</math>, so it will take Moe <math>1.35</math> hours to finish mowing the lawn. Thus the answer is <math>\boxed{\textbf{(C) } 1.35}</math>.
+Since the swath Moe actually mows is <math>2</math> feet wide, he mows <math>10000</math> square feet in one hour. His lawn has an area of <math>13500</math>, so it will take Moe <math>1.35</math> hours to finish mowing the lawn. Thus the answer is <math>\boxed{\textbf{(C) } 1.35}</math>.
 ==See Also==
 {{AMC10 box|year=2003|ab=B|num-b=4|num-a=6}}

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Difference between revisions of "2003 AMC 10B Problems/Problem 5"

Revision as of 10:42, 22 February 2012

Problem

Solution

See Also