9. Write the algebraic expressions for the following situations.
(i). The speed of a bus is z m/s. Write its speed in km/h.
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72 km/hr
= 72 × 5/18 m/sec
= 20 m/sec
Speed of bicycle = 90 km/hr
To convert the speed into m/sec, we multiply by 5/18
Therefore, speed of bicycle = 90 × 5/18 m/sec = 25 m/sec
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Answer:
zm/s=8z/15
Step-by-step explanation:
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