Advertisements
Advertisements
Question
Ten gram of an alloy of metals A and B contains 7.5 gm of metal A and the rest is metal B. Find the ratio between :
(i) the weights of metals A and B in the alloy.
(ii) the weight of metal B and the weight of the alloy.
Solution
Total weight of A and B metals = 10 gm A’s weight = 7.5 gm B’s weight = 10 – 7.5 = 2.5 gm
(i) Ratio between A and B = 7.5 : 2.5
`= 75/10 : 25/10 = 3:1`
(ii) Ratio between B and total alloy
`= 2.5 : 10 = 25/10 : 10`
⇒ 25 : 100 = 1 : 4
APPEARS IN
RELATED QUESTIONS
If a : b = 4 : 7, find the following:
`(6"a" - "b")/("a" + 3"b")`
A man's monthly inoome is Rs 5,000. He saves every month a minimum of R~ 800. Find the ratio of his:
Annual expenses to annual Income.
Find the compounded ratio of the following:
(m-n):(m+n), (m+n)2 : (m2+n2) and (m4 - n4): (m2-n2) 2
Which of the following ratio is greater ?
5 : 8 and 7 : 10
Express the following ratios in its simplest form :
4:6
Find the ratio between 5 dozen and 2 scores. [1 score = 20]
If `(by + cz )/(b^2 + c^2) = (cz + ax)/(c^2 + a^2) = (ax + by)/(a^2 + b^2)` then show that each ratio is equal to `x/a = y/b = z/c`.
Two numbers are in the ratio 5: 7. Their difference is 10. Find the numbers.
Check whether the following quantities form a proportion or not?
`1 1/2, 3 1/4, 4 1/2 "and" 9 3/4`
Find the mean proportional between 0.6 and 9.6
If A : B = 2 : 3, B : C = 4 : 5 and C : D = 6 : 7, find A : D
A school collected Rs 2100 for charity. It was decided to divide the money between an orphanage and a blind school in the ratio of 3 : 4. How much money did each receive?
Fill in the place holder:
If a bus covers 195 km in 3 hours and a train covers 300 km in 4 hours, then the ratio of their speeds is
The ratio of zinc and copper in an alloy is 7 : 9. If the weight of copper in the alloy is 12.6 kg, find the weight of zinc in it.
If a : b = 9 : 10, find the value of `(5a + 3b)/(5a - 3b)`
0.2:5 = 2:0.5
There are 20 girls and 15 boys in a class. What is the ratio of number of girls to the number of boys?
Find the ratio of the following:
55 paise to ₹ 1
Given below is a Mathematical term.
Find the ratio of consonants to vowels in the term.
