A duck flew at 18 km per hour for 3 hours, then at 15 km per hour for 2 hours.How far did the duck fly in all?
a) 69 km
b) 75 km
c) 81 km
d) 84 km
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Step-by-step explanation:
Duck fly 18km/h then it cover distance in 3hour
=54
then it 15km/h then it cover distance in 2hour=30
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