The weight of a boy on an analog weighing machine was found out to be $62 k g$ . After stepping down from the machine, the boy realized that the needle pointed at $3 k g$ instead of $0$ . The correct weight of the boy is ________.

65 k g

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59 k g

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56 k g

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68 k g

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Solution

The correct option is B $59 k g$
Given:
Weight of the boy with zero error, $W_{f} = 62 k g$
Zero error, $z = 3 k g$

Zero error is equal to the value of the reading and has the same sign when there is no load. This means that zero error is added to the final reading displayed.

Let the actual weight of the boy be $W_{i}$ .
$W_{f} = W_{i} + z$
$W_{i} = 62 k g - 3 k g$
$W_{i} = 59 k g$

Hence, actual weight of the boy is $W_{i} = 59 k g$ .

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The weight of a boy on an analog weighing machine was found out to be 62 kg. After stepping down from the machine, the boy realized that the needle pointed at 3 kg instead of 0. The correct weight of the boy is ________.

The weight of a boy on an analog weighing machine was found out to be $62 k g$ . After stepping down from the machine, the boy realized that the needle pointed at $3 k g$ instead of $0$ . The correct weight of the boy is ________.