Answer: 60 grams
Explanation:
Hi, to answer this question we have to analyze the information given: 
- Weight of one seed packet: 28 grams 
- Number of packets: 2 
So, to calculate the total weight of two seed packets we simply have to multiply the weight of each seed packet (28) by the number of packets (2) 
Mathematically speaking: 
28 x 2 = 56 grams 
Rounded to the nearest ten grams = 60 grams