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fractions - bathtub

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Intern
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Joined: 19 Jan 2009
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fractions - bathtub [#permalink]

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New post 28 Jan 2009, 14:34
This topic is locked. If you want to discuss this question please re-post it in the respective forum.

A's hot tub is half filled. His swimming pool, which has a capacity 4 times of that of the tub, is filled to 4/5 of its capacity. If the hot tube is drained into the swiming pool, to what fraction of its capacity will the pool be filled?

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Re: fractions - bathtub [#permalink]

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New post 28 Jan 2009, 14:38
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jairus wrote:
A's hot tub is half filled. His swimming pool, which has a capacity 4 times of that of the tub, is filled to 4/5 of its capacity. If the hot tube is drained into the swiming pool, to what fraction of its capacity will the pool be filled?


A's full capacity = C
tubs capacity = 4C

water filled =4C*4/5+ C/2 = (16/5 +1/2 ) *C= 37/10 *C

Fraction of capacity filled = (37/10 *C)/4C = 37/40
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Senior Manager
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Re: fractions - bathtub [#permalink]

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New post 28 Jan 2009, 23:35
jairus wrote:
A's hot tub is half filled. His swimming pool, which has a capacity 4 times of that of the tub, is filled to 4/5 of its capacity. If the hot tube is drained into the swiming pool, to what fraction of its capacity will the pool be filled?


for these types of questions I always like creating my own numbers.
For example:
Hot Tub Capacity is 20 (since it is half-filled it has 10 units in it)
Pool is 80 (20 * 4) and is filled with 64 units (4/5 * 80)
Add the 10 in the tub to the pool and the new total in the pool is 74/80 = 37/40.

Kudos [?]: 117 [0], given: 2

Re: fractions - bathtub   [#permalink] 28 Jan 2009, 23:35
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