Answer:
The time will be "2 hours".
Explanation:
Around 10 km/hr, lava eruptions were travelling. The vents was just 15 km (9.3 mi) away Kalapana city as well as 20 km (12.6 mi) from Pahoa city.
So, we therefore need add the method, which would be: to taking out another time that civil defense officials just had to assess a city.
⇒ 
Thus, to measure the time spent throughout the community of Kalapana,
⇒ 

The civil defense officers provide 1.5 hours of time each assess the city of Kalapana.
In order to measure the time spent in the towns of Pahoa,
⇒ 

Abundant moisture and warm temperatures result in high rates of chemical weathering.
Chemical weathering is due to rainwater reacting with the mineral grains in rocks to shape new minerals (clays) and soluble salts. these reactions arise especially while the water is slightly acidic.
Weathering breaks matter down into smaller portions. The motion of pieces of rock or soil to new places is known as erosion. Weathering and erosion can cause adjustments to the form, length, and texture of different landforms (together with mountains, riverbeds, seashores, and so forth).
The most important element of weathering is its role in the formation of soil. with out soil, existence, as we realize it on the earth, might not exist. Soil is a miles unnoticed element of earth's strategies and, at contemporary rates of human use and abuse, is becoming a finite useful resource.
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The rigid portion of earth composed of the crust and the uppermost part of the mantle is the lithosphere.
The solid and outer part of the Earth is referred to as lithosphere. The lithosphere constitutes the brittle upper portion of the mantle and the crust which is the outermost layer amongst all the layers of Earth’s structure. The lithosphere can be further divided into two categories. One is the oceanic lithosphere and the other is continental lithosphere.
Oceanic lithosphere is associated with oceanic crust. They are found in the ocean basins. Continental lithosphere is associated with the continental crust.
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