Question

if the cost of 1000 eggs 21 rupees what will be the cost of 5 eggs

Answer 1

1 egg cost
$\frac{21}{1000} = 0.021$
5 egg cost =
0.021 × 5 = 0.105

Answer 2

cost of 1000 eggs = 21 rupees

Then the cost of 1 egg = 21 / 1000

= 0.021 rupees

Then the cost of 5 eggs = cost of 1 egg × 5

= 0.021 × 5

= 0.105

Therefore, the cost of 5 eggs will be 0.105 rupees.