Answer:
540g flour
4tsp baking powder
8tbsps sugar
520mL milk
4 eggs
8tbsps oil
Explanation:
To find out how many times he would need to make the recipe, we can divide 20 by 5:

Now we know that Sanjay must make the recipe four times to make 20 pancakes. We need to multiply each value by 4 to get how much he needs to make 20.
