Let 1st radio price will be X And 2nd radio price is Y. So both radio price is 6000rs
Writting sentence 1) into equation we get
X+Y=6000……..………………..(1)
1st radio sold at 20% profit & 2nd radio sold at 10% loss. And shopkeeper gained 2% profit on 6000rs investment
By writing sentence 2) into equation we get
1.2X+0.9Y=6120(102% 6000)………. (2)
By solving 1 & 2
We get
X=2400
Y=3600
I hope this help you