Answer:
The answer is "0.45385".
Step-by-step explanation:
The time is taken to reach the coast
The time is taken to reach Q after reaching the coast 
Total time,
This has to be minimum,


x=0.45385
The answer would be 6. This be because 6 + -8 = -2.
Answer:
The volume of diamond is 20 cubic inches.
Step-by-step explanation:
We are given the following in the question:
Triangular base:
Base = 4 inches
Height = 5 inches
Height of the pyramid = 6 inches
Area of triangular base =

Volume of diamond = Volume of pyramid

Thus, the volume of diamond is 20 cubic inches.