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Ratio and Proportions Basics - 1
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Ratio basics part - 1

## Bharat Gupta is teaching live on Unacademy Plus

Bharat Gupta
Engineer by degree Mathematician by Heart. Having 22 years of teaching experience. More than 20000 students selected.

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Sir, how to solve a question in which there's ratio of A, B, C, D and E. the ratio of A:B:C is 2:4:5 whereas the ratio of B:D:E is 7:8:9... the what will be the A:B:C:D:E????
sir can you please tell me which book you are following or which book have good concepts for quant? thanks for this video.
thank you, it was beautifully explained! :)
J
sir aap bhut acha pdhate hai sir .sir mein itni coaching bhi le pr kise ne bhi itna acha nhi pdhai kbhi thank u so much bharat sir ji and also thank for unacademy app thanku
Thank you sir for wonderful explanation :)
1. RATIO AND PROPORTION Class - 1(Basic)

2. Ratio is a comparison of two quantities by division. Since ratio is an abstract quantity, two quantities must be in the same unit. Ratio of two quantity represents the number of times one quantity contains another quantity of the same kind. Ratio is a comparison of two Like quantities. vals aal or 3

3. Types of Ratio 1. Direct Ratio If two quantity are related to each other in a way that if value of one is increased or decreased, then other value also increases or decreases accordingly. For example Distance is product of speed and time. If time is constant, then increase in speed will increase distance also. 2. Inverse Ratio If two quantity are related to each other in a way that if value of one is increased or decreased, then other value also decreases or increases accordingly. For example: Distance is product of speed and time, if distance is constant, then increase in speed, will decrease time and vice vasa. Time and Speed contain inverse ratio.

4. Rules of Ratio: 1. Cancellation Law: 2 a: b: c= l4 2 3: 7 2. LCM Law .3 3

5. Combining Ratio: a :b23

6. Combining Ratio: ink a: b 3: 2 2 2 2 4

7. Rs 777 is distributed between three person A, B and C. Ratio of A & B is 4: 5 and that of B and C is 3: 2. Find share of B. a. 252 b. 315 C. 210 d. 273

8. Rs 777 is distributed between three person A, B and C. Ratio of A & B is 4:5 and that of B and C is 3 2. Find share of B. a. 252 b. 315 C. 210 d. 273 ABC um

9. If a:b 7:9 and b:c 15:7, then what is a:c? a. 5: 3 b. 3 5 c.7 21 d. 7:15

10. If a:b 7:9 and b:c 15:7, then what is a:c? a. 5: 3 b. 3 5 c.7 21 d. 7:15 ST s:2-