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:
- the weights of metals A and B in the alloy.
- the weight of metal B and the weight of the alloy.
Advertisements
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 is 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
Find triplicate ratio of 1 : 3
Find the sub-duplicate ratio of 9x2a4 : 25y6b2
Find the reciprocal ratio of e following :
`17/45 : 51/27`
Two numbers are in the ratio 5: 7. Their difference is 10. Find the numbers.
Which of the following numbers are in continued proportion:
6, 12 and 24
Find the value of x of the following such that the given numbers are in proportion.
14, 42, x and 75
The length of two ropes are in the ratio 7 : 5. Find the length of:
(i) shorter rope, if the longer one is 22.5 m
(ii) longer rope, if the shorter is 9.8 m.
Shubham’s age today is 12 years and his father’s is 42 years. Shubham’s mother is younger than his father by 6 years. Find the ratio of Shubham’s age today to his mother’s age today.
Express the following ratio in the simplest form:
85 : 561
There are 102 teachers in a school of 3300 students. Find the ratio of the number of teachers to the number of students.
