You eat a strawberry calculate the amount of plant material you would have to eat to gain 1kg of mass (assume the rule of 10applies)
Assuming that the rule of 10 applies, which states that 10% of energy is transferred between trophic levels, we can estimate the amount of plant material needed to gain 1kg of mass.
On average, strawberries have a caloric content of about 4 calories per gram. This means that you would need to consume 250 grams (0.25kg) of strawberries to gain 1kg of mass.
Using the rule of 10, we can estimate that for every 1kg of plant material consumed, only 10% (0.1kg) of that energy is transferred to the consumer. Therefore, you would need to consume 10 times the amount of plant material, or 2.5kg, to gain 1kg of mass.