Answer:
432
Explanation:
We are given that if there are 3 sunflowers in a garden with 81 roses.
We have to find the number of roses in a garden with `16 sunflowers.
In order to find the number of roses we will use unitary method
There are 3 sunflower in a garden with number of roses=81
1 sunflower in a garden with number of roses=

16 sunflower in a garden with number of roses=

Therefore, then number of roses are 432 in a garden with 16 sunflowers.
Hence, the number of roses in a garden with 16 sunflowers=432