The oven tray is 600mm by 500mm. a cake tin is 25cm in diameter. how many cake tins can jenny fit on the oven tray at one time?

Oven tray: 600 mm by 500 mm
cake tin: 25 cm in diameter

convert mm to cm.

1 cm = 10 mm

600mm * 1cm/10mm = 60cm
500mm * 1cm/10mm = 50cm

Area of oven tray = 60cm * 50cm  = 3,000 cm²
Area of cake tin = 3.14 * (25cm/2)² = 3.14 * (12.5cm)² = 3.14 * 156.25cm² = 490.625 cm²

3,000cm² ÷ 490.625cm² = 6.11 or 6 cake tins can fit on the oven tray at one time.