Thousands of fruit bats leave each evening to search for food before returning at dawn. Assuming a speed of 30kmph and 12 hours of darkness, how many bats would there need to be to fly a total distance in equivalent to flying around the world?

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Solution

One bat can cover 30 x 12 = 360 km in one night

Distance around the world is 40,075 km (Earth’s circumference)

40,075 / 360 = 112 bats