Question

We need weights weighing 500 grams each to balance a sack of rice weighing 3 kg.

• A. 4
• B. 6
• C. 8
• D. 2

Answer 1

The correct option is B 6

When the weights on both pans are equal, the beam of a balance balances.

$\therefore$ When we place the sack of rice weighing 3 kg on one pan of the balance, the weight on the other pan should also be 3 kg for the beam to balance.

We know that $3\text{kg}=3\times 1000\text{g}=3000\text{g}.$

$\therefore$ We need $\frac{3000}{500}=6$ weights of 500 grams to each on the other pan.