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# Four adults consume food costing \$60 on a 3-day fishing trip. If a chi

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Math Expert
Joined: 02 Sep 2009
Posts: 58414
Four adults consume food costing \$60 on a 3-day fishing trip. If a chi  [#permalink]

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26 Sep 2018, 05:16
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Difficulty:

15% (low)

Question Stats:

89% (01:29) correct 11% (02:23) wrong based on 37 sessions

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Four adults consume food costing \$60 on a 3-day fishing trip. If a child consumes half the amount of food consumed by an adult, what would be the cost of food consumed by 6 adults and 3 children during a 4-day fishing trip?

(A) \$180
(B) \$150
(C) \$125
(D) \$90
(E) \$75

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Re: Four adults consume food costing \$60 on a 3-day fishing trip. If a chi  [#permalink]

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26 Sep 2018, 07:15
Top Contributor
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Bunuel wrote:
Four adults consume food costing \$60 on a 3-day fishing trip. If a child consumes half the amount of food consumed by an adult, what would be the cost of food consumed by 6 adults and 3 children during a 4-day fishing trip?

(A) \$180
(B) \$150
(C) \$125
(D) \$90
(E) \$75

A quick approach here is to assume that the people EAT MONEY

GIVEN: Four adults consume \$60 in THREE days.
So, four adults consume \$20 in ONE DAY
So, ONE adult consumes \$5 in ONE day

A child consumes half the amount of food consumed by an adult
So, we now know that ONE child consumes \$2.50 in ONE day

What would be the cost of food consumed by 6 adults and 3 children during a 4-day fishing trip?
Fact: ONE adult consumes \$5 in ONE day
So, SIX adults consume \$30 in ONE day
So, SIX adults consume \$120 in FOUR days

Fact: ONE child consumes \$2.50 in ONE day
So, THREE children consume \$7.50 in ONE day
So, THREE children consume \$30 in FOUR days

So, TOTAL CONSUMED = \$120 + \$30 = \$150

Cheers,
Brent
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Re: Four adults consume food costing \$60 on a 3-day fishing trip. If a chi  [#permalink]

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29 Sep 2018, 17:57
Bunuel wrote:
Four adults consume food costing \$60 on a 3-day fishing trip. If a child consumes half the amount of food consumed by an adult, what would be the cost of food consumed by 6 adults and 3 children during a 4-day fishing trip?

(A) \$180
(B) \$150
(C) \$125
(D) \$90
(E) \$75

Since 4 adults consume 60 dollars over 3 days, 4 adults consume 20 dollars per day, and thus 1 adult consumes 20/4 = 5 dollars per day.

Thus, each child consumes 2.5 dollars per day.

So 6 adults will consume 6 x 5 = 30 per day and hence 30 x 4 = 120 dollars for 4 days.

3 children will consume 2.5 x 3 = 7.5 per day and hence 7.5 x 4 = 30 dollars for 4 days.

So the total is 150 dollars.

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Re: Four adults consume food costing \$60 on a 3-day fishing trip. If a chi   [#permalink] 29 Sep 2018, 17:57
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