Question

To balance a scale with the right pan with 5 packets of 100 g cardamom, packets of 25g pepper should be placed on the left pan.

Answer 1

To balance the scale, both pans should have equal weights.
Weight on the right pan = 5 $\times$ 100 = 500 g
Since one packet of pepper weighs 25 g,
Number of pepper packets needed = 500 $÷$25 = 20