Question
There were 7 convertibles at the parking area. The distance between each convertible was equal for all the convertibles. The distance between the first convertible and the fourth convertible was 21 m. What was the distance between the 1st and the 7th convertible?
4 m

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There were 7 convertibles at the parking area. The distance between each convertible was equal for all the convertibles. The distance between the first convertible and the fourth convertible was 21 m. What was the distance between the 1st and the 7th convertible?