Determine the surface area of each cone. Use π= 22/7 Answer: Number 14: 704 sq. dm Number 15: 396 sq. cm Step-by-step explanation: For number 14: Step 1: Write the given Slant height= 20 dm Radius= 8 dm Step 2: Find the surface area using the formula shown below. Total surface area: π=22/7 Total surface area for number 14 is 704 sq. dm. For number 15: Step 1: Write the given Slant height= 15 cm Diameter= 12 cm Since diameter is equal to twice of the radius, then at 12 cm diameter the radius is equal to 6 cm . Step 2: Find the surface area using the formula shown below. Total surface area: π=22/7 Total surface area for number 14 is 396 sq. cm. Therefore, the total surface area of number 14 and 15 are 704 sq. dm and 396 sq. cm, respectively. Note: Lateral surface area is different to total surface area as it is only equal to (π*radius*slant height). In case lateral surface area is needed, the answer are as follows: Lateral surface area of number 14 is 502.86 sq. dm. Lateral surf...
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