Answer:65.5
Step-by-step explanationIf Meena's marks were 52 and Radhika secured 13.5 marks more than Meena, then Radhika's marks can be found by adding 13.5 to Meena's marks:
Radhika's marks = Meena's marks + 13.5
Radhika's marks = 52 + 13.5
Radhika's marks = 65.5
So, Radhika secured 65.5 marks.: