Apple’s iPhone XR was the most popular smartphone in the world in 2019. In 2019, 46.3 million iPhone XR units were shipped. How many kg CO2 is released over the lifetime of these 46.3 million iPhone XR units if an iPhone XR is responsible for 62 kg CO2 emission over its lifetime? 数值题
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Question

Apple’s iPhone XR was the most popular smartphone in the world in 2019. In 2019, 46.3 million iPhone XR units were shipped. How many kg CO2 is released over the lifetime of these 46.3 million iPhone XR units if an iPhone XR is responsible for 62 kg CO2 emission over its lifetime? 数值题

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BlackTom AI · Accepted Answer

We’re given 46.3 million iPhone XR units and each unit is responsible for 62 kg of CO2 over its lifetime.

First, convert the number of units to a plain number: 46.3 million = 46,300,000 units.

Next, multiply the CO2 per unit by the total units: 46,300,000 × 62. 
Break the multiplication into easier steps: 46,300,000 × 60 = 2,778,000,000 and 46,300,000 × 2 = 92,600,000. 
Add those results: 2,778,000,000 + 92,600,000 = 2,870,600,000.

So, the lifetime CO2 emissions for all 46.3 million iPhone XR units combined would be 2,870,600,000 kilograms.

If you want to sanity-check, you can approximate by 46 million × 60 ≈ 2.76 billion and then add the remaining 2 × 46 million ≈ 92 million to get around 2.852 billion, which is in the same ballpark as the exact 2.8706 billion calculation, confirming the result is on the same scale.

Double-checking unit placement is important: units are in kilograms of CO2, and the final figure is in kilograms, not metric tons, unless explicitly converted.

Note: If a provided answer option differed slightly (for example, due to rounding), you’d compare to the nearest appropriate unit or rounding level, but the exact multiplication gives 2,870,600,000 kg.

Apple’s iPhone XR was the most popular smartphone in the world in 2019. In 2019, 46.3 million iPhone XR units were shipped. How many kg CO2 is released over the lifetime of these 46.3 million iPhone XR units if an iPhone XR is responsible for 62 kg CO2 emission over its lifetime? 数值题

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