What is the question? It looks like a statement...
Answer:
Explanation:
The explanations and answers are shown in the following attachments
Answer:
extrusive,
Explanation:
lava exlodes outwards, making it extrusive and not intrusive.
Answer:
2.77mpa
Explanation:
compressive strength = 20 MPa. We are to find the estimated flexure strength
We calculate the estimated flexural strength R as
R = 0.62√fc
Where fc is the compressive strength and it is in Mpa
When we substitute 20 for gc
Flexure strength is
0.62x√20
= 0.62x4.472
= 2.77Mpa
The estimated flexure strength is therefore 2.77Mpa