Acone-shaped building has a height of 11.4 meters and a base with a diameter of 12 meters. the building will be filled with road salt that costs $20 per cubic meter.

how much will it cost to fill the building with road salt?

use 3.14 for π .

Answer

$8,591.04

Explanation

In this question we shall find the volume of the cone as the first step.

Volume of a cone = 1/3 π r²h

where r = radius of the base and

           h = height of the cone

∴ Volume = 1/3 × 3.14 × (12/2)² × 11.4

                  = 1/3 × 3.14 × 6² × 11.4

               = 429.552 m³

Each cubic meter cost $20.

1,718.208 m³ will cost = 429.552 m³ × $20

                                      = $8,591.04

54 kilometers per hour

step-by-step explanation:

according to rules:

1 km = 1000 meter

which means that 1 meter = 1/1000 km

1 hour = 3600 second [ as 1 hour = 60 min = 60 *60 seconds ]

which means that 1 second = 1/3600 hour

therefore, 1 kilometer/hour =

thus to convert 15 meter per second to kilometer per hour, we multiply 15 to 3.6 kilometer/hour.

15 meter/second=   which is the required answer.