3 : 5 : : □ : 20

3 : 5 : : `square` : 20

रिकाम्या जागा भरा

3 : 5 : : 12 : 20

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पाठ 3: Ratio and Proportion - Exercise 3.3 [पृष्ठ ५८]

पाठ 3 Ratio and Proportion
Exercise 3.3 | Q 1. (i) | पृष्ठ ५८

Find the mean proportion of the following :

24 and 6

If a : b = c : d; then show that (ax+ by) : b = (cx+ dy) : d

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

The weight of 65 books is 13 kg.
(i) What is the weight of 80 such books?
(ii) How many such books weigh 6.4 kg?

If the cost of 12 pens is Rs 138, then the cost of 14 such pens is

If `a/c = c/d = c/f` prove that : (b² + d² + f²) (a² + c² + e²) = (ab + cd + ef)²

If the ratios formed using the numbers 2, 5, x, 20 in the same order are in proportion, then ‘x’ is

If b : a = c : d, then a, b, c, d are in proportion.

Bachhu Manjhi earns Rs. 24000 in 8 months. At this rate, in how many months does he earn Rs. 42000?

Are the following statements true?

32 m : 64 m = 6 sec : 12 sec