Given four weights that weigh 500 g, 1 kg, 2 kg and 5 kg. If Vimal places 7 kg of flour on one pan of the balance, then the weights he has to place on the other pan so that the pans balance are _______.
A
1 kg and 5 kg
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B
1 kg and 2 kg
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C
2 kg and 5 kg
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D
500 g and 2 kg
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Solution
The correct option is C 2 kg and 5 kg One pan of the balance has 7 kg of flour in it.
For the pans to balance, the total weight of the stones on the other pan should be equal to 7 kg.
Note that
1 kg + 5 kg = 6 kg,
1 kg + 2 kg = 3 kg,
2 kg + 5 kg = 7 kg and
500 g + 2 kg = 2 kg 500 g.