See image — AITS & Test Series Chemistry Question

💡 Solution & Explanation

3 A Z m d N a    3 23 3 4 108 90 10 6 10 a      Distance between X & Y 10 20 10 2    10 10 10 m    3 21 4 108 a 6 9 10     3 21 a 8 10   7 a 2 10 cm    9 a 2 10 m    10 a 20 10 m   