Find the compounded ratio of: 2 : 3 and 4 : 9

Sum

2 : 3 and 4 : 9
Compound ratio

= `(2)/(3) xx (4)/(9)`

= `(8)/(27)` or 8 : 27.

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Chapter 6: Ratio and Proportion - Exercise 7.1

Chapter 6 Ratio and Proportion
Exercise 7.1 | Q 2.1

If m : n = 3 : 8, find the value of (3m+2n) : (5m+n)

Find the compounded ratio of the following:

(m-n):(m+n), (m+n)² : (m²+n²) and (m⁴ - n⁴): (m²-n²) ²

Two numbers are in the ratio 5 : 7 and the difference of their squares is 600. Find the numbers.

Express the following ratios in its simplest form :
3 m : 90 cm

Check whether the following quantities form a proportion or not?

0.8, 3, 2.4 and 9

Find the fourth proportional of 3, 12 and 4

Find the triplicate ratio of 3 : 4

The ratio of zinc and copper in an alloy is 7 : 9. If the weight of copper in the alloy is 12.6 kg, find the weight of zinc in it.

The ratio of the shorter sides of a right angled triangle is 5 : 12. If the perimeter of the triangle is 360 cm, find the length of the longest side.

The ratio of 150 cm to 1 metre is 1 : 1.5.