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Question
Abdul has 3 stones of weight 6 kg, 5 kg and 2 kg.
An object of which of the following weight cannot be measured using these 3 stones on a weighing balance?
Abdul has 3 stones of weight 6 kg, 5 kg and 2 kg.
An object of which of the following weight cannot be measured using these 3 stones on a weighing balance?
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Solution
The correct option is D 10 kg
Abdul can weigh 3 kg by putting 5 kg stone on one side of the balance and 2 kg stone on the other balance. The difference will give 5 - 2 = 3 kg. So 3 kg object can we placed along with the 2 kg stone to balance.
He can weigh 4 kg by putting 6 kg stone on one side of the balance and 2 kg stone on the other side of the balance. The difference will give 6 - 2 = 4 kg. So 4 kg object can be placed along with the 2 kg stone to balance.
He can weigh 7 kg by putting 5 kg stone and 2 kg stone together on one side of the balance and the 7 kg object on the other side. The sum will give 5 + 2 = 7 kg.
But, Abdul cannot weigh 10 kg using these stones.
Abdul can weigh 3 kg by putting 5 kg stone on one side of the balance and 2 kg stone on the other balance. The difference will give 5 - 2 = 3 kg. So 3 kg object can we placed along with the 2 kg stone to balance.
He can weigh 4 kg by putting 6 kg stone on one side of the balance and 2 kg stone on the other side of the balance. The difference will give 6 - 2 = 4 kg. So 4 kg object can be placed along with the 2 kg stone to balance.
He can weigh 7 kg by putting 5 kg stone and 2 kg stone together on one side of the balance and the 7 kg object on the other side. The sum will give 5 + 2 = 7 kg.
But, Abdul cannot weigh 10 kg using these stones.
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