Salman purchases 7 kg 670 gm of potatoes and 3 kg 42 gm of onions and some tomatoes. Find the weight of tomatoes (in kg) if he purchases a total of 12 kg of vegetables.
A
1.28
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B
1.7
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C
1.288
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D
1.378
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Solution
The correct option is C 1.288 Weight of potatoes = 7 kg 670 gm = 7 kg + 670 gm = 7 kg+ 6701000kg (∵1kg=1000gm) = 7 kg + 0.67 kg = 7.67 kg Similarly, weight of onions = 3 kg + 421000kg = 3 kg + 0.042 kg = 3.042 kg Since the total weight of vegetables is 12 kg, we have: Weight of tomatoes = 12 kg - Weight of potatoes - Weight of onions = 12 kg - 7.67 kg - 3.042 kg = 1.288 kg