Proportional Reasoning 2 Class 8 Fill in the blanks
easyProportional Reasoning 2 Class 8 Fill in the blanks
Proportional Reasoning 2 Class 8 Fill in the blanks
Question 1.
If x = 5y, then x and y vary with ____________ each other.
Answer:
directly
Question 2.
If xy = 10, then x and y vary ______________ with each other.
Answer:
inversely
Question 3.
When two quantities x and y are in __________ proportion or vary __________ they are written as x ∝ y.
Answer:
direct, directly
Question 4.
The perimeter of a circle and its diameter vary __________ with each other.
Answer:
directly.
Proportional Reasoning 2 Class 8 True or False
Question 1.
When the speed is kept fixed, time and distance vary inversely with each other.
Answer:
False
Question 2.
When the distance is kept fixed, speed and time vary directly with each other.
Answer:
False
Question 3.
Length of a side of a square and its area vary directly with each other.
Answer:
False
Question 4.
Length of a side of an equilateral triangle and its perimeter vary inversely with each other.
Answer:
False
Question 5.
If d varies directly as t², then we can write dt² = k, where k is some constant.
Answer:
False
Proportional Reasoning 2 Class 8 Match the Following
Match the Column I with Column II.
| Column I | Column II |
| (i) x and y vary inversely to each other | (a) y will decrease in proportion |
| (ii) Mathematical representation of inverse variation of p and q | (b) xy = constant |
| (iii) When x = 5, y = 2.5 and when y = 5, x = 10 | (c) x and y are directly proportional |
| (iv) When x = 10, y = 5 and when x = 20, y = 2.5 | (d) d ∝ [latex]\frac{1}{q}[/latex] |
| (v) If x and y vary directly, then on decreases x | (e) x and y are inversely proportional |
Answer:
(i) - (b)
(ii) - (d)
(iii) - (c)
(iv) - (e)
(v) - (a)