Direct and Inverse Variation Class-8th RS Aggarwal ICSE Mathematics Goyal Brothers Prakashan Chapter-9. We provide step by step Solutions of Exercise / lesson-10 Direct and Inverse Variation for ICSE Class-8 RS Aggarwal Mathematics.
Our Solutions contain all type Questions of Exe-10 A, Exe-10 B, (MCQ) and Mental Maths with Notes to develop skill and confidence. Visit official Website CISCE for detail information about ICSE Board Class-8 Mathematics.
Direct and Inverse Variation Class-8th RS Aggarwal ICSE Mathematics Goyal Brothers Prakashan Chapter-9
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Direct Proportion Definitions
The proportion is said to be a direct proportion between two values when one is a multiple of the other.
Directly Proportion Symbol
The symbol used to represent the direct proportion is “∝”.
Inverse Proportion
The value is said to inversely proportional when one value increases and the other decreases. The proportionality symbol is used in a different way.
Inverse Proportion Definition
Two quantities a and b are said to be in inverse proportion if an increase in the quantity a, there will be a decrease in the quantity b, and vice-versa
How to Set up an Equation?
- First, write down the proportional symbol
- Convert it as an equation using the constant of proportionality
- Find the constant of proportionality from the given information
- After finding the constant of proportionality, substitute in an equation.
Exercise – 10 A, Direct and Inverse Variation Class-8th RS Aggarwal ICSE Mathematics Goyal Brothers Prakashan
Question 1 :
If the cost of 40 toy is 1024. what is the cost of one dozen such toys?
Question 2:
If 18 notebook …………………… 425.50 ?
Question 3:
………………….
………………….
………………….
…………………..
Question 15:
7 worker working 6 hours a day can build a wall in 12 days. Hoe many days will 3 worker take to build a similar wall, working 8 hour a day.
Direct and Inverse Variation Exercise – 10 B MCQ of Class-8th RS Aggarwal Mathematics Goyal Brothers Prakashan
choose the correct option in each of the following :
Question 1:
If 20 article cost 90. the cost of 9 article is.
…………………
Question 2:
With 1000 Rs. one can buy 4 pair …………………… and 3 shirts ?
Question 3:
…………………
…………………
………………..
Question 11:
if 4/5 th part of ………………… rest of it.
Mental Maths, Chapter-10 of ICSE Class-8 Mathematics Goyal Brothers Prakashan
fill in the blanks………….
Question 1:
(i) when x and y are in direct proportion then
(ii) If x men can do ………………. days.
(iii) If m article cost ……….
(iv) If 8 oranges cost ………….
(v) 6 pipe can fill…………..
Question 2:
Write true or false :
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