Ratio and Proportion: 100: 2 :: 60: X
X=1.2
X=12
X=1.6
X=2.2
Correct Answer : A
The proportion equation of the ratio 100:2=60:X is
\(\frac{100}{2}=\frac{60}{X}\)
Cross-multiply to find the value of X
\(100X=2\ast60\)
\(100X=120\)
Divide both sides by 100
\(\frac{100X}{100}=\frac{120}{100}\)
\(X=1.2\)
The value of X is 1.2
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Related Questions
Correct Answer is ["11"]
Explanation
The number of boys in a class is 44% of 25 students
44%of25
Convert 44% to fraction and carry out the multiplication as follows
\(\frac{44}{100}\ast25=11\ boys\)
Thus, there are 11 boys in a class of 25 students.
Correct Answer is ["2.4"]
Explanation
The ratio 240:X=80:0.8 to proportion equation becomes
\(\frac{240}{X}=\frac{80}{0.8}\)
Find value of X by cross-products
\(240\ast0.8=80X\)
\(192=80X\)
Divide both sides by 80
\(\frac{192}{80}=\frac{80X}{80}\)
\(2.4=X\)
Thus, X=2.4
Correct Answer is A
Explanation
0.004 as a fraction is
\(\frac{4}{1000}=\frac{1}{250}\)
In ratio form 1/250=1:250
Thus 0.004 as a ratio is 1:250.
Correct Answer is ["5.3"]
Explanation
Total time taken to cover 24-mile course is the total time taken to cover course in phases.
\(Total\ \ time=\left(1+1.2+1.5+1.6\right)hrs=5.3\ hrs\)
The young adult female will take 5.3 hours to cover a 24-mile race.
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