Question

Є чотири кульки вагою 10г, 20г., 30г, і 40 г.Яка з кульок важить 30г.?

Answer 1

Важить 30 г та кулька, у якої маса дорівнює 30г)

Answer 2

Finding the 30g Ball

To find out which ball weighs 30g, we can add the weights of the balls and then subtract the total from 100g (the sum of all the balls' weights). This will give us the weight of the remaining ball, which is the 30g ball.

Calculation

Let's calculate the weight of the 30g ball using the given weights of the balls (10g, 20g, 30g, and 40g).

10g + 20g + 30g + 40g = 100g 100g - (10g + 20g + 40g) = 30g

Therefore, the 30g ball is the one that weighs 30g.