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At Vinny’s pizza place, the price of each pizza is proportional to its

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At Vinny’s pizza place, the price of each pizza is proportional to its  [#permalink]

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New post 10 Feb 2017, 09:38
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Question Stats:

79% (01:32) correct 21% (00:43) wrong based on 62 sessions

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At Vinny’s pizza place, the price of each pizza is proportional to its area. If a large pizza has a 14-inch diameter and sells for $14, what does a customer pay, rounded to the nearest dollar, to buy two 10-inch diameter small Vinny’s pizzas?

A. $14
B. $16
C. $18
D. $20
E. $22

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Re: At Vinny’s pizza place, the price of each pizza is proportional to its  [#permalink]

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New post 10 Feb 2017, 11:12
Bunuel wrote:
At Vinny’s pizza place, the price of each pizza is proportional to its area. If a large pizza has a 14-inch diameter and sells for $14, what does a customer pay, rounded to the nearest dollar, to buy two 10-inch diameter small Vinny’s pizzas?

A. $14
B. $16
C. $18
D. $20
E. $22



14inch dia = area = 49Pi inch^2---------$14
1 inch^2 -----------14/49Pi
thus for 2*25Pi ------------14*2*25pi/49pi (since area of 10inch dia=25Pi)

=100/7 == ~$14


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Re: At Vinny’s pizza place, the price of each pizza is proportional to its  [#permalink]

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New post 18 Feb 2017, 15:32
1
14 inch pizza's area = 49Pi
10 inch pizza's area = 25Pi
2x10 inch pizza = 50Pi (almost same area as 14 inch pizza), therefore cost should be about $14
Re: At Vinny’s pizza place, the price of each pizza is proportional to its &nbs [#permalink] 18 Feb 2017, 15:32
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