Showing posts with label learn ratios. Show all posts
Showing posts with label learn ratios. Show all posts

Thursday, May 23, 2013

Ways to Help to Learn Ratios


Introduction to ways to help to learn ratios:
The ratios contain the fractional numbers. The ratio of two numbers a and b in the same units is the fractions a/b, it can be written as a: b., where a represent the antecedent and b represent the consequent. We can represent (a: b)> (c: d) as (a/ b)> (c/ d). The multiplication and division of the terms of the ratio by the same number does not affect the ratio.

I like to share this Rates and Ratios with you all through my article.

Example problem for learn ratios:

Example 1 to learn ratios:

Divide 350 in the ratio 2:3.

Solution:

The sum of the ratio terms = 2+3=5

For the ratio 2,

First part= 350 x (`2/5` ) =140

For the ratio 3,

Second part= 350 x (`3/5` ) =210

Example 2 to learn ratios:

A mixture has the alcohol and water in the ratio of 4:2. If 5 liters of the water is mixed with the mixture, the ratios can be changed to 4:5. What is the quantity of alcohol in that mixture?

Solution:

Let the quantity of alcohol and water is 4x liters and 2x liters respectively. Then the ratio is,

`(4x)/(2x+5)`= `(4)/(5)`

20x =4(2x+5)

20x= 8x+ 20

28x=20

x=0.71

The quantity of the alcohol =4x 0.71 = 2.8 liters.

Example 3 to learn ratios:

Find the simplified ratio for 49: 324.

Solution:

The given ratio is 49: 324

The above ratio can be written as 72: 182.

The ratio can be simplified as 7: 18.

The ratio 121: 169 can be simplified as 11: 13.

Understanding Multiplying Fractional Exponents is always challenging for me but thanks to all math help websites to help me out.

Practice problem for learn ratios:


A bag consists of 50 p, 25 p and 10 p coins in the ratio of 2: 3: 4, amounting to Rs. 206. What is the number of coins of each type?
Answer: 50 p coins are 192, 25 p coins are 288 and 10 p coins are 384.

Worker A takes 2 hours to do a particular work. Worker B takes 5 hours to do the same work. How long it take both of them A and B, working jointly but independently to do the same work?
Answer: `10/7 ` days

A and B together can complete a piece of work in 6 days. If A alone can finish the same work in 12 days, in how many days can B alone complete that work?
Answer: 12 days