Question

In a​ volcano, erupting lava flows continuously through a tube system about 21 kilometers to the sea. Assume a lava flow speed of 0.5 kilometer per hour and calculate how long it takes to reach the sea.

Answer 1

Answer:

21 kilometers to the sea. Assume a lava flow speed of 0.5 kilometer per hour and calculate how long it takes to reach the sea.

Step-by-step explanation:

21 kilometers to the sea. Assume a lava flow speed of 0.5 kilometer per hour and calculate how long it takes to reach the sea.

Answer 2

Volcano will reach the sea in 42 hours

Given - Distance and rate

Find - Time taken

Solution - We are given the rate of speed of volcano. It interprets that to cover 0.5 kilometre, volcano takes 1 hour. Now, using the unitary method, we will find the time required by volcano to cover 21 kilometres and hence reach the sea.

Time taken to travel 0.5 kilometre = 1 hour

Time taken to travel 1 kilometre = 1÷0.5

Performing Division

Time taken to travel 1 kilometre = 2 hours

So, time taken to travel 21 kilometres = 2×21

Performing multiplication

Time required to reach the sea = 42 hours

Hence, time required to reach the sea will be 42 hours.

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