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Re: A water tank has [#permalink]
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KarunMendiratta wrote:
Carcass wrote:
A water tank has \(6 m^3\) of water. The tank has one outlet drawing water at a different rate based on the user's need. If the tap is allowed to supply water at a constant rate of flow for two days, identify ther rates that would reduce the water by more than a third of the initial capacity within that period of time

Select all that apply

A. \(16 cm^3/s\)

B. \(10 cm^3/s\)

C. \(12 cm^3/s\)

D. \(14 cm^3/s\)

E. \(9.5 cm^3/s\)

F. \(9 cm^3/s\)


Carcass
Beautiful question :thumbsup:
This question has a sole purpose to waste our time on the test!

reduce the water by more than a third of the initial capacity within that period of time

i.e. more than \(\frac{1}{3}(6) m^3\) in \(2\) days or more than \(2 m^3\) of water in \(2\) days

Let us calculate the rate;

Work = \(2(10^6)cm^3\)
Time = \((2)(24)(3600)sec\)

Rate = \(\frac{2(10^6)}{(2)(24)(3600)} = 11.57cm^3/sec\)

This means we require a rate which is greater than \(11.57cm^3/sec\)
Hence, option A, C, and D



Thank you Sir :please:

Best Reply to you also
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Re: A water tank has [#permalink]
KarunMendiratta wrote:
Carcass wrote:
A water tank has \(6 m^3\) of water. The tank has one outlet drawing water at a different rate based on the user's need. If the tap is allowed to supply water at a constant rate of flow for two days, identify ther rates that would reduce the water by more than a third of the initial capacity within that period of time

Select all that apply

A. \(16 cm^3/s\)

B. \(10 cm^3/s\)

C. \(12 cm^3/s\)

D. \(14 cm^3/s\)

E. \(9.5 cm^3/s\)

F. \(9 cm^3/s\)


Carcass
Beautiful question :thumbsup:
This question has a sole purpose to waste our time on the test!

reduce the water by more than a third of the initial capacity within that period of time

i.e. more than \(\frac{1}{3}(6) m^3\) in \(2\) days or more than \(2 m^3\) of water in \(2\) days

Let us calculate the rate;

Work = \(2(10^6)cm^3\)
Time = \((2)(24)(3600)sec\)

Rate = \(\frac{2(10^6)}{(2)(24)(3600)} = 11.57cm^3/sec\)

This means we require a rate which is greater than \(11.57cm^3/sec\)
Hence, option A, C, and D


Why do you multiply by 3600 in (2)(24)(3600)sec? isn't a day has 86400 seconds?
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Re: A water tank has [#permalink]
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I was wondering as well :?
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Re: A water tank has [#permalink]
1
ademeutia wrote:
KarunMendiratta wrote:
Carcass wrote:
A water tank has \(6 m^3\) of water. The tank has one outlet drawing water at a different rate based on the user's need. If the tap is allowed to supply water at a constant rate of flow for two days, identify ther rates that would reduce the water by more than a third of the initial capacity within that period of time

Select all that apply

A. \(16 cm^3/s\)

B. \(10 cm^3/s\)

C. \(12 cm^3/s\)

D. \(14 cm^3/s\)

E. \(9.5 cm^3/s\)

F. \(9 cm^3/s\)


Carcass
Beautiful question :thumbsup:
This question has a sole purpose to waste our time on the test!

reduce the water by more than a third of the initial capacity within that period of time

i.e. more than \(\frac{1}{3}(6) m^3\) in \(2\) days or more than \(2 m^3\) of water in \(2\) days

Let us calculate the rate;

Work = \(2(10^6)cm^3\)
Time = \((2)(24)(3600)sec\)

Rate = \(\frac{2(10^6)}{(2)(24)(3600)} = 11.57cm^3/sec\)

This means we require a rate which is greater than \(11.57cm^3/sec\)
Hence, option A, C, and D


Why do you multiply by 3600 in (2)(24)(3600)sec? isn't a day has 86400 seconds?


ademeutia
Carcass

Because I have calculated total number of seconds in 2 days
i.e. 2 x 24 hours = 2 x 24 x 3600 sec
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Re: A water tank has [#permalink]
why?
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Re: A water tank has [#permalink]
1
ChirLois16 wrote:
why?


Please read the question carefully ..
If the tap is allowed to supply water at a constant rate of flow for two days
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Re: A water tank has [#permalink]
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Thank you for clarifying Sir
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Re: A water tank has [#permalink]
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