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A bird leaves its nest, and flies back and forth from its nest to a ne

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Bunuel
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A bird leaves its nest, and flies back and forth from its nest to a ne [#permalink] New post   18 May 2021, 04:45
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A bird leaves its nest, and flies back and forth from its nest to a nearby ditch to gather worms. The distance between the nest and the ditch is 200 meters. In one and a half hours, the bird manages to bring worms to its nest 15 times. What is the speed of the bird in kilometers per hour?

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Re: A bird leaves its nest, and flies back and forth from its nest to a ne [#permalink] New post   18 May 2021, 05:04
Distance covered by the bird per trip is 400m.

If the bird flew 15 trips, the total distance covered by the bird is: 400*15 = 6000m or 6km

Speed = Distance/Time

6/1.5 = 4km/h

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Re: A bird leaves its nest, and flies back and forth from its nest to a ne [#permalink] New post   18 May 2021, 06:10
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To bring 1 worm, there is a roundtrip. Therefore, distance covered is 200 + 200 = 400.

For 15 worms, total distance covered will be 400 * 15 = 6,000 m or 6 km

Time: 1.5 hr

Speed = 4kmph

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Re: A bird leaves its nest, and flies back and forth from its nest to a ne [#permalink] New post   18 May 2021, 06:47
Given : A bird leaves its nest, and flies back and forth from its nest to a nearby ditch to gather worms. The distance between the nest and the ditch is 200 meters. In one and a half hours, the bird manages to bring worms to its nest 15 times.

Asked: What is the speed of the bird in kilometers per hour?

Distance travelled by the bird = 200*15*2 = 6000 m = 6 km
Time taken = 1.5 hours
Speed = Distance travelled / Time taken = 6 / 1.5 = 4 km/hour

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Re: A bird leaves its nest, and flies back and forth from its nest to a ne [#permalink]
18 May 2021, 06:47
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