Given:
The diameter of the sphere = 42 cm
To find the volume of the given sphere.
Formula:
The volume of a sphere is given by
The radius is given by
<u>Volume of the sphere:</u>
The volume of the sphere is given by
Simplifying, we get;
Multiplying the terms, we have;
Dividing, we get;
Thus, the volume of the sphere is 38772.7 cubic cm.
Given:
Distance between Lily and Wilder = 810 miles
They drive towards each other with Lily driving at 55 mph and Wilder driving at 80 mph.
To find:
After how many hours will they meet?
Solution:
Lily driving at 55 mph and Wilder driving at 80 mph towards each other. So, the relative speed is:
Relative speed
We know that,
Therefore, Lily and Wilder will meet after 6 hours.