Question

Peter weighs is 105 kg. His wants to lose 500 g per week. How many weeks will it take for him to have a mass of 90 kg

Answer 1

30

Explanation:

500 g = 1/2 kg => 2 weeks he loses 1 kg

105 - 90 = 15 kg

So he needs to take 30 weeks in total. ( 15 * 2)

Answer 2

• 500g=0.5kg

Let weeks be x

So

• 105-0.5x=90
• 0.5x=105-90
• 0.5x=15
• x=15/0.5
• x=30weeks