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A moving company charges a flat rate of $550 for loading its trucks an

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A moving company charges a flat rate of $550 for loading its trucks an  [#permalink]

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New post 23 Mar 2019, 12:28
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A moving company charges a flat rate of $550 for loading its trucks and an additional $20 per \(\frac{1}{5}\) mile for moves within the city. How much would a move of 2.8 miles within the city cost?

A. $690
B. $790
C. $830
D. $880
E. $1,010

Source: McGraw-Hill's GMAT (6th)
Difficulty Level: 550

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Re: A moving company charges a flat rate of $550 for loading its trucks an  [#permalink]

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New post 23 Mar 2019, 13:30
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SajjadAhmad wrote:
A moving company charges a flat rate of $550 for loading its trucks and an additional $20 per \(\frac{1}{5}\) mile for moves within the city. How much would a move of 2.8 miles within the city cost?

A. $690
B. $790
C. $830
D. $880
E. $1,010

Source: McGraw-Hill's GMAT


Fixed cost+ Variable cost = Total Cost

Fixed cost= 550
Variable cost= the amount \(\frac{1}{5}\) goes into 2.8 miles multiplied by 20
It is helpful to know off the top of your head that \(\frac{1}{5}\)=.2, so the division becomes relatively simple.
\(\frac{2.8}{.2}\)= \(\frac{28}{2}\) = 14

550+14(20)= total cost
550+280=830

Answer: C
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Re: A moving company charges a flat rate of $550 for loading its trucks an  [#permalink]

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New post 24 Mar 2019, 08:26
SajjadAhmad wrote:
A moving company charges a flat rate of $550 for loading its trucks and an additional $20 per \(\frac{1}{5}\) mile for moves within the city. How much would a move of 2.8 miles within the city cost?

A. $690
B. $790
C. $830
D. $880
E. $1,010

Source: McGraw-Hill's GMAT


charges per mile
20/.2 = 100$
so
for 2.8 miles = 280 $
total charges 280 + 550 ; 830 $
IMO C
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Re: A moving company charges a flat rate of $550 for loading its trucks an   [#permalink] 24 Mar 2019, 08:26
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A moving company charges a flat rate of $550 for loading its trucks an

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