What is the volume of a hemisphere with a diameter of 61.5cm?

60897cm³ (5sf)

Step-by-step explanation:

Radius = 61.5 ÷ 2 = 30.75cm

Volume of sphere = 4πr³/3

Hemisphere's volume = (4π(30.75)³ ÷ 3) ÷ 2 = 60897cm³ (5sf)

answer is c

step-by-step explanation:

81/12=324/x

x=48

363 square inches

step-by-step explanation:

surface area of a pyramid is b + 1/2ph

b is the area of the base: 11 x 11 = 121

p is the perimeter of the base: 11 + 11 + 11 + 11 = 44

h is the height of the pyramid: 11

121 + 1/2(44)(11)

121 + 242

363