a duck flew at 18km per hour for first 3hour , then at 15 km per hours for next 2 hours . With what average speed did the duck fly
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Answer:
42 km per hour as the ducks average.
Step-by-step explanation:
18 km = 3 hours
18 x 3 = 54 km for 3 hours
15 km = 2 hours
15 x 2 = 30 km for 2 hours
Average = 30 + 54 = 84/2 = 42
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