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 the ratio compounded of the duplicate ratio of 5 : 6, the reciprocal ratio of 25 : 42 and the sub-duplicate ratio of 36 : 49.
Find the second term of the proportion whose first, third, and fourth terms are 9, 8, and 24 respectively.
In the example below, find the ratio of the first number to the second.
24, 56
In the example below, find the ratio of the first number to the second.
52, 65
Arrange the following ratios in ascending order of magnitude: 2 : 3, 17 : 21, 11 : 14 and 5 : 7
A factory produces electric bulbs. If 1 out of every 10 bulbs is defective and the factory produces 630 bulbs per day, find the number of defective bulbs produced each day.
If a bus travels 160 km in 4 hours and a train travels 320 km in 5 hours at uniform speeds, then the ratio of the distances travelled by them in one hour is ______.
A line segment 56 cm long is to be divided into two parts in the ratio of 2 : 5. Find the length of each part.
Length and breadth of the floor of a room are 5 m and 3 m, respectively. forty tiles, each with area `1/16` m2 are used to cover the floor partially. Find the ratio of the tiled and the non tiled portion of the floor.
Express `33 1/3%` as a ratio in the lowest term.
