Solving mathematical and real-world problems involving surface area of cones

A party hat has a diameter of 18 centimeters and a slant height of 7 centimeters. Calculate the amount of material it takes to make this party hat.

• 904.8 cm²

• 395.8 cm²

• 254.5 cm²

• 452.4 cm²

7.) Find the value of x in the cone

(a)  

Find the surface area

• 164.9yd²

• 329.9yd²

• 612.6yd²

• 227.8yd²

Find the total surface area of the figure.

Find the slant height of a cone with diameter 32 and height 63.

• 70

• 64

• 65

• 72

Find the surface area. Use 3.14 for pi.

• 373.66

• 1055.04

• 467.86

• 877.24

Find the surface area of a cone with a radius 1cm and a slant height as 10cm. Leave your answer in term of π.

SA= B + LA

(a)  

Find the surface area of a cone with a radius 2ft and a slant height as 8ft. Leave your answer in term of π. 
SA= B + LA

•  $20\pi\ ft^2$  

•  $16\pi ft^2$  

•  $25\pi ft^2$  

•  $80\pi ft^2$  

Find the surface area

• 1275.63m²

• 824.7m²

• 1649.3m²

• 3534.3m²

Find the surface area of a cone with a length of 5 centimeters and a radius of 7 centimeters.

• 32.28 centimeters²

• 80.83 centimeters²

• 276.5 centimeters²

• 401.25 centimeters²