Which is Faster - Changed Time Units (Level 2)

This math topic involves comparing speeds of different objects when the time units are varied. The skills practiced involve calculating and understanding speed in non-standard units such as meters per minute, kilometers per day, and millimeters per millisecond. The exercises often require converting between different time units to assess which of two entities (e.g., bugs, horses, or spaceships) is moving faster given its distance covered within a specified time frame. This topic is part of an advanced unit on Speed, Distance, and Time.

Work on practice problems directly here, or download the printable pdf worksheet to practice offline.

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Speed - Which is Faster - Changed Time Units Worksheet

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Speed - Which is Faster - Changed Time Units
1
Bacteria A moves 30dm in 8d. Bacteria B moves 40dm in 144hr. Which is faster?
a
Bacteria A
b
Bacteria B
2
Rocket A flies 50dm in 4ms. Rocket B flies 50dm in 0.006s. Which is faster?
a
Rocket A
b
Rocket B
3
Train A travels 40cm in 7ms. Train B travels 20cm in 0.004s. Which is faster?
a
Train A
b
Train B
4
Horse A trots 40m in 6min. Horse B trots 20m in 240s. Which is faster?
a
Horse A
b
Horse B
5
Train A travels 50dam in 8s. Train B travels 30dam in 0.12min. Which is faster?
a
Train A
b
Train B
6
Horse A trots 20dm in 6s. Horse B trots 30dm in 0.08min. Which is faster?
a
Horse A
b
Horse B
7
Bacteria A moves 50dm in 5d. Bacteria B moves 20dm in 144hr. Which is faster?
a
Bacteria A
b
Bacteria B
8
Car A drives 30dam in 7s. Car B drives 40dam in 7,000ms. Which is faster?
a
Car A
b
Car B