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

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

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New post 26 Sep 2018, 05:16
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A
B
C
D
E

Difficulty:

  15% (low)

Question Stats:

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

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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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New post 26 Sep 2018, 07:15
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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
we already know that ONE adult consumes $5 in ONE day
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

Answer: B

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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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New post 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.

Answer: B
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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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