Question

We need weights weighing 500 grams each to balance a sack of rice weighing 1 kg.

• A. 2
• B. 3
• C. 4
• D. 10

Answer 1

The correct option is A 2

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

$\therefore$ When we place the sack of rice weighing 1 kg on one pan of the balance, the weight on the other pan should also be 1 kg for the beam to balance.

We know that $1\text{kg}=1000\text{g}.$

$\therefore$ We need $\frac{1000}{500}=2$ weights of 500 grams to each on the other pan.