First we have 2 types of units of measurement so let’s make all the same type. 600mm= 60 cm 500mm= 50 cm Tray dimensions are 60 by 50 cm and is a rectangle
Cake tin is round and has diameter 25 cm
We can fit 2 rows and 2 columns of tins Since (25+25) is less or equal to 50 And (25+25) is less or equal to 60