Which weighs more: a watermelon that weighs 19.5 kilograms or a toddler that weighs 40 pounds?

The watermelon.

Step-by-step explanation:

You can convert the unit of either the watermelon or the toddler to pounds of kilograms.

I'll convert them to kilograms.

Watermelon: 19.5 kg

Toddler: 40 pounds [Divide the value by 2.205, this is just a formula]

=40/2.205

=~18.1

Since 19.5 > 18.5, therefore the watermelon is heavier.

Answer: watermelon

1 kg = 2.205 lb

(19.5) (2.205) = 42.99 lb