Answer:
the scale drawing of the parallelogram is 2 and 5
Explanation:
The computation of the scale drawing of the parallelogram is shown below:
For 6 cm length, it is 
= 6 × 1 ÷ 3 
= 2 
And for 15 cm it is 
= 15 × 1 ÷ 3
= 5
Hence, the scale drawing of the parallelogram is 2 and 5