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Question

A volcanic eruption ejects about 43,600,000,000cubic feet of volcanic rock. A smaller volcanic eruption ejects about 75%of this amount. What is the approximate amount of volcanic rock that the smaller volcanic eruption ejects?


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Solution

Given, A volcanic eruption ejects about 43,600,000,000cubic feet of volcanic rock.

A smaller volcanic eruption ejects about 75%of this amount.

Approximate amount of volcanic rock that the smaller volcanic eruption ejects =75100×43,600,000,000

=75×43,600,000,000

=3,270,000,000,000


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