Ratio and Proportion: 5: 1000:: X: 500
X=0.25
X=2.5
X=1.5
X=10
Correct Answer : B
The ratio 5:1000=X:500 can be written in proportion as:
\(\frac{5}{1000}=\frac{X}{500}\)
The value of X is determined by cross-products
\(5\ast500=1000X 2500=1000X \)
Divide both sides by 1000
\(\frac{2500}{1000}=\frac{1000X}{1000} 2.5=X \)
Thus, the value of X is 2.5
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Related Questions
Correct Answer is D
Explanation
First step is to find to convert the given fractions into approximate decimals as follows:
7/25=0.28
8/15=0.53
4/19=0.21
4/5=0.8
From the above, 0.8 is the largest value. Then, it follows that 4/5 is the largest number
Correct Answer is ["9.5"]
Explanation
otal time taken to cover 32-mile course is the total time taken to cover course in phases.
\(Total\ \ time=\left(2+2.2+2.5+2.8\right)hrs=9.5\ hrs\)
The young adult female will take 9.5 hours to cover a 32-mile race.
Correct Answer is A
Explanation
Compare the four fractions, find the least common divisor for denominators 7, 6, 9 and 8 which is 504.
Now multiply each fraction with 504 as:
4/6*504=336
4/8*504=258
4/9*504=224
4/7*504=288
From the above calculations, 336 is the greatest, which follows that 4/6 is the largest fraction.
Correct Answer is C
Explanation
Using a calculator and carry out the division as follows:
\(\frac{6.6}{0.6}=11\)
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