UPSKILL MATH PLUS

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1. Neelaveni goes by bi-cycle to her school every day. Her average speed is 12 \ km/hr and she reaches school in 20 minutes. What is the increase in speed, if she reaches the school in 15 minutes?
 
km/hr
 
2. A toy company requires 36 machines to produce car toys in 54 days. How many machines would be required to produce the same number of car toys in 81 days?
 
machines