The image shows a triple beam balance, which is an instrument for measuring mass
The mass in the image is 290.2 grams
The reason for arriving at the above answer is as follows;
The triple beam balance is a measuring instrument used for making
precise mass measurement to an accuracy of ±0.05 grams. The three
beams it consists of is what is referred to in its name
To measure a mass using the triple beam balance, after adjusting the
sliders to have an balance point as seen on the pointer balance, the
number representing the positions of the three sliding masses on the three
beams are added to give the mass
In the given image, we have;
The position of the 10-gram slider = 90-grams
The position of the 100-gram slider = 200-grams
The position of the 1-gram slider = 0.2-grams
The mass reading is therefore;
Mass = 90 g + 200 g + 0.2 g = 290.2 g
The mass is 290.2 grams
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