3 : 5 : : □ : 20 - Mathematics

3 : 5 : : `square` : 20

Fill in the Blanks

3 : 5 : : 12 : 20

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Chapter 3: Ratio and Proportion - Exercise 3.3 [Page 58]

Chapter 3 Ratio and Proportion
Exercise 3.3 | Q 1. (i) | Page 58

Find the fourth proportion to the following:

3,5 and 15

Find the mean proportion of the following :

24 and 6

Find the value of x in the following proportions : 10 : 35 = x : 42

Find the fourth proportional to `(1)/(3), (1)/(4), (1)/(5)`

Determine if the following ratio form a proportion:

25 cm : 1 m and Rs 40 : Rs 160

The cost of 18 chairs is Rs 22770. How many such chairs can be bought for Rs 10120?

If 25 : 35 : : 45 : x, then the value of x is

The length and breadth of a rectangular field are in the ratio 5 : 4. If the width of the field is 36 m, what is its length?

Find the missing number in the box in the proportions:

`16/36 = square/63 = 36/square = square/117`

Write True (T) or False (F) against the following statement:

12 : 18 : : 28 : 12