The compound ratio of 2:3,9:4 and 2:5 isOptions3:53:25:35:41:7

To find the compound ratio of 2:3, 9:4 and 2:5, you need to multiply the corresponding terms of the ratios together.

Step 1: Write down the ratios The ratios are 2:3, 9:4 and 2:5.

Step 2: Multiply the corresponding terms Multiply the first terms together (292) to get 36. Multiply the second terms together (345) to get 60.

Step 3: Write the compound ratio So, the compound ratio of 2:3, 9:4 and 2:5 is 36:60.

Step 4: Simplify the ratio The ratio 36:60 can be simplified by dividing both numbers by their greatest common divisor, which is 12. So, 36 ÷ 12 = 3 and 60 ÷ 12 = 5.

Therefore, the compound ratio of 2:3, 9:4 and 2:5 is 3:5.