Answer :
Hey there!
1,000:
= 2 × 2 × 2 × 5 × 5 × 5
= 4 × 2 × 5 × 5 × 5
= 8 × 5 × 5 × 5
= 40 × 25
= 1,000
180:
= 2 × 2 × 3 × 3 × 5
= 4 × 3 × 3 × 5
= 12 × 15
= 180
LOOKING FOR THE LCM (Lowest Common Multiple)
(1,000 × 180) ÷ 20
= 180,000 ÷ 20
= 9,000
[Answer: 9,000]
Good luck on your assignment and enjoy your day!
~Amphitrite1040:)