Question
The total heights of three ostriches is 1400 cm. Ostrich D is twice as tall as Ostrich E. Ostrich F is twice as tall as Ostrich D. What is the height of Ostrich F?
4 m

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The total heights of three ostriches is 1400 cm. Ostrich D is twice as tall as Ostrich E. Ostrich F is twice as tall as Ostrich D. What is the height of Ostrich F?