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Of the 2,500 tons of ore mined daily at a quarry, 0.4 percent results

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Of the 2,500 tons of ore mined daily at a quarry, 0.4 percent results [#permalink]

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New post 23 May 2017, 00:58
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83% (01:00) correct 17% (01:30) wrong based on 99 sessions

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Of the 2,500 tons of ore mined daily at a quarry, 0.4 percent results in a certain pure metal. In how many days of mining will the total amount of pure metal produced at the quarry be equal to the daily amount of ore mined?

A 10
B 100
C 250
D 400
E 1,000
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Re: Of the 2,500 tons of ore mined daily at a quarry, 0.4 percent results [#permalink]

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New post 23 May 2017, 01:41
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Out of 2500 tons of ore, daily amount of pure metal = 0.4% of 2500
= 0.4/100 * 2500 = 10 tons

Daily pure metal is 10 tons, We have to find number of days where it will be equal to 2500 tons
2500/10 = 250. Hence C answer
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Re: Of the 2,500 tons of ore mined daily at a quarry, 0.4 percent results [#permalink]

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New post 22 Feb 2018, 17:28
michaelkalend wrote:
Of the 2,500 tons of ore mined daily at a quarry, 0.4 percent results in a certain pure metal. In how many days of mining will the total amount of pure metal produced at the quarry be equal to the daily amount of ore mined?

A 10
B 100
C 250
D 400
E 1,000


Each day 2,500 x 0.4/100 = 25 x 0.4 = 10 tons of pure metal is mined.

So it will take 2500/10 = 250 days to mine 2500 tons of pure metal.

Answer: C
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Re: Of the 2,500 tons of ore mined daily at a quarry, 0.4 percent results   [#permalink] 22 Feb 2018, 17:28
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