Advertisements
Advertisements
Question
An alloy contains only zinc and copper and they are in the ratio of 7:9. If the weight of the alloy is 8 kg, then find the weight of copper in the alloy.
Solution
The ratio of the weight of zinc and copper is 7:9.
Let the weight of zinc be 7 : x kg and the weight of copper be 9x kg.
The weight of the alloy = 8 kg
⇒ 7x + 9x = 8
⇒ 16x = 8
⇒ x = `8/16 = 1/2`
So, the weight of copper = `9 xx 1/2` kg = `9/2` kg
= `4 1/2` kg
APPEARS IN
RELATED QUESTIONS
What quantity must be subtracted from each term of the ratio 9 : 17 to make it equal to 1 : 3?
If `x/a = y/b = z/c` show that: `x^3/a^3 + y^3/b^3 + z^3/c^3 = (3xyz)/(abc)`.
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`.
The ratio between two numbers is 3: 4. If their L.C.M., is 180. Find the numbers.
Reduce the following ratio to their lowest term:
5 kg 500 gm : 2 kg 750 gm
If x, y, and z are in continued proportion, then which of the following is true:
x : x = z : y
The cost of parking a bicycle is ₹ 5 and the cost of parking a scooter is ₹ 15. Find the simplest ratio of the parking cost of a bicycle to that of a scooter
A ratio will always be more than 1.
The yield of wheat from 8 hectares of land is 360 quintals. Find the number of hectares of land required for a yield of 540 quintals?
Given below is a Mathematical term.
Find the ratio of consonants to vowels in the term.
