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A box full of dry fruits weighs 12.650 kg. If the weight of the dry fruits is 9 kg 800 g, the weight of the empty box is:
2825 g
2850 g
2750 g
2725 g
2850 g
Convert both values to grams: 12.650 kg = 12650 g and 9 kg 800 g = 9800 g. Then subtract: 12650 - 9800 = 2850 g.
Weight of box full of dry fruits = 12.650 kg, Weight of dry fruits = 9 kg 800 g
Wempty=Wtotal−Wfruits
Convert both values to grams: 12.650 kg = 12650 g and 9 kg 800 g = 9800 g. Then subtract: 12650 - 9800 = 2850 g.
Confusing decimal notation: 9.800 kg is 9 kg 800 g, not 9.080 kg. Always convert units to a single base (grams) before subtracting.
Convert all units to grams
Since 1 kg=1000 g, we convert the total weight and the fruit weight into grams.
12.650 kg=12650 g,9 kg 800 g=9800 g
Calculate empty box weight
Subtract the weight of the fruits from the total weight of the box.
Wempty=12650 g−9800 g=2850 g
Verify result
The result is 2850 g, which matches the provided Option B.
2850 g
B is correct because the difference between 12650 g and 9800 g is 2850 g.
This type of subtraction problem frequently appears in arithmetic sections of RRB exams; always check unit consistency (kg/g) before performing operations.
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