Respuesta :

Answer:

23

Step-by-step explanation:

21·21=441÷2·2=441

24·60=1,440·2=2880

24·40=960·2=1,920

441+2880+1920=5,241

5,241÷400=13.1025  which is goes upto 23

Answer:

A

Step-by-step explanation: