Grades 3-4 Video Solutions 2021-video 2021 3-4/8

Video Transcription

Video Summary

Rosanna has 7 balls of 3 different colors with same colors having equal weights. To find the weight of each white ball, we analyze the scales. The first scale shows a black and a grey ball weighing 6 kg together. The third scale adds another grey ball for a total of 10 kg, indicating each grey ball weighs 4 kg. On the second scale, two grey and two white balls total 14 kg. Subtracting the grey weights (8 kg) leaves 6 kg shared by two white balls, making each white ball weigh 5 kg. Thus, each white ball weighs 5 kg, option C.

Keywords

ball weights

color balls

weight analysis

scale measurement

white ball weight