Video: Measuring the Mass of an Object in Grams Using Scales

What is the mass of the basketball?

01:32

Video Transcript

What is the mass of the basketball?

In this question, we have to find the mass of the ball. But there’s a problem. There’s a ball and a cube or a box on the measuring scale. This scale tells us the mass of the box and the ball together. The dial on the scale is pointing to the number 600. So we know the mass of the box and the ball is 600 grams.

On the second set of scales, there’s just the cube. The dial on the scale is pointing to the number 400, which means the mass of the cube is 400 grams. So we have to find the difference between 600 grams and 400 grams. What is 600 take away 400? It’s 200.

If the mass of the cube and the ball together is 600 grams and the mass of the cube on its own is 400 grams, then the mass of the ball on its own is 200 grams. To find the mass of the ball, we subtracted 400 from 600. The mass of the ball is 200 grams.

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