Answer:
D, 1200
Step-by-step explanation:
V of Cylinder= (pi)r^2h
r=radius h=height
we know the area of a circle which is (pi)r^2. So we can just multiply that by the height to get the answer.
100x12=1200
there
also for 12 its D
25.72 rounded to one decimal place is 25.7
The area of each triangular face is
.. A = (1/2)*b*h
.. Aside = (1/2)*(6 cm)*(5 cm) = 15 cm^2
The area of the triangular base is
.. Abase = ((√3)/4)*s^2 = (√3)/4*(6 cm)^2 = 9√3 cm^2
The total surface area is the base area plus the area of the three sides.
.. Atotal = Abase + 3*Aside
.. = 9√3 cm^2 +3*15 cm^2
.. = (45 +9√3) cm^2
.. ≈ 60.6 cm^2
Actually, there's an error in the picture. The height of the side should be 4, and the length of the edge should be 5. Making that adjustment, the total area is 51.6 cm^2.
It is hard to tell what is intended. Not all answers are showing, so we can't "reverse-engineer" the problem from the answers.
Answer:
3.92 in percent is written as,
3.92×100 = 392
i.e.,option D.