# The biomass of hares in the forest is 200,000 kg, one hare weighs 2 kg, hares are eaten by wolves, the biomass of each

The biomass of hares in the forest is 200,000 kg, one hare weighs 2 kg, hares are eaten by wolves, the biomass of each wolf is 50 kg. According to the rule of the ecological pyramid, determine how many hares and wolves were in the forest?

The biomass of hares is 200,000 kg, one hare weighs 2 kg, we determine the number of hares:

200,000 kg / 2 kg = 100,000 hares

According to the rule of the food pyramid, only ten percent of the energy goes to each next level. In accordance with this rule, we define the biomass of wolves:

200,000 kg (biomass of hares) * 10% = 20,000 kg

One wolf weighs 50 kg. Let’s determine the number of wolves:

20,000 kg / 50 kg = 400 wolves.

Conclusion: 100,000 hares and 400 wolves live in the forest.

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