Advertisements
Advertisements
Question
The ratio of copper and zinc in an alloy is 9 : 8. If the weight of zinc, in the alloy, is 9.6 kg; find the weight of copper in the alloy.
Solution
Let the weight of copper = x kg
Weight of zinc = 9.6 kg.
According to question,
9 : 8 = x : 9.6
⇒ 8 × x = 9 × 9.6
⇒ x = `(9xx9.6)/8` = 9 × 1.2 = 10.8 kg.
Weight of copper in alloy = 10.8
APPEARS IN
RELATED QUESTIONS
Find sub-triplicate ratio of x3 : 125y3
A man's monthly inoome is Rs 5,000. He saves every month a minimum of R~ 800. Find the ratio of his:
monthly savings to monthly expenses.
Find the triplicate ratio of the following :
`2 sqrt 5 : 5 sqrt 2`
If (3x-4) : (2x+5) is the duplicate ratio of 3 : 4 , find x.
The present age of two persons are in the ratio 4: 3. Nine years hence their ages will be in the ratio 23: 18. Find their present ages.
Express the following ratios in its simplest form :
2.5 : 1.5
If `a/(b + c) = b/(c + a) = c/(a + b)`, show that each ratio is equal to `(1)/(2) or -1`.
Is divided between A and B in such a way that A gets half of B. Find :
(i) the ratio between the shares of A and B.
(ii) the share of A and the share of B.
In a club has 360 members, 40 play carrom, 96 play table tennis, 144 play badminton, and remaining members play volley-ball. If no member plays two or more games, find the ratio of members who play:
(i) carrom to the number of those who play badminton.
(ii) badminton to the number of those who play table-tennis.
(iii) table-tennis to the number of those who play volley-ball.
(iv) volleyball to the number of those who play other games.
Ratio of the distance of the school from A’s home to the distance of the school from B’s home is 2 : 1.
(i) Who lives nearer to the school?
(ii) Complete the following table:
In the example below, find the proportion of the first number to the second.
52, 65
The sides of a triangle are in the ratio 7 : 5 : 3 and its perimeter is 30 cm. Find the lengths of sides.
If the angles of a triangle are in the ratio 2 : 3 : 4, find the angles.
Fill in the place holder:
5 kg : 7.5 kg = Rs 7.50 : Rs 5
A ratio is a form of comparison by ______.
A rectangular sheet of paper is of length 1.2 m and width 21 cm. Find the ratio of width of the paper to its length.
Find the ratio of the following:
33 km to 121 km
If the sub-duplicate ratio of 6x2 : 24y2 is ______.
