A kilogram is a measure of mass, not of weight, and so 30 maths books cannot possibly weigh 3 or 30 kilograms just as they cannot weight 3 or 30 minutes, or 3 or 30 metres.
About 30 kilograms.
30 - 80 kg.
It will weigh 30, thirty kilograms .
Willow Smith weighs 30 kilograms.
About 30 to 35 kilograms
A pint of 30 percent calcium chloride weight 0.7426 kg
A dog's weight can vary widely depending on its breed, size, and age. Common dog weights in the metric system are typically measured in kilograms. For example, a small breed dog may weigh around 5-10 kilograms, a medium breed dog may weigh around 15-25 kilograms, and a large breed dog may weigh 30 kilograms or more.
1,989,881,989,610,210,000,000,000,000,000 kilograms
Different sizes have different weights. Around 30 pounds is average.
To convert kilograms to pounds, you would multiply the weight in kilograms by 2.20462. Therefore, if someone weighed 30 kg, they would weigh approximately 66.14 lbs.
An elephant's tongue can weigh around 30-40 kilograms (66-88 pounds).
Each nickel weighs 5 grams. To calculate how much 30 dollars' worth of nickels would weigh, divide the total value by the weight of one nickel. $30 in nickels would weigh 3000 grams or 3 kilograms.