Corn growth sweet corn plants can grow 4.2 cm in height per day. what is this speed in millimeters per second

The speed growth given by the problem is 4.2 cm/day, so we must convert each unit to the one asked by the problem. Each centimeter has 10 mm, so 4.2 (10) = 42 mm. Each day has 24 hours, each hour has 60 minutes, and each minute has 60 seconds, so 24 (60) (60) = 86400 sec. If we divide 42 mm between 86400 seg we obtain a growth speed of 0,000486 mm/sec.

40.20 millimeters i believe