Respuesta :

Answer: If the whole thing of the rocket is 18.1 and the vertex 7.7 above the cone how can we round that up to the nearest minute? And its 15 minutes

Step-by-step explanation: you would have to multiply the minutes into the vertex to find out to round the nearest minute, the divided that by the whole volume of the rocket

musiclover10045

Volume of a cone = PI * r^2 * h/3

Volume = PI * 3.9^2 * 5.3/3

Volume = 84.375 cubic cm

Volume of cylinder = PI*r^2 *h

Volume = PI * 3.9^2 * (18.1-5.3-3.9)

Volume = PI * 3.9^2 * 8.9

Volume = 425.06 cubic cm.

Volume of hemisphere = 2/3 * PI * r^3

Volume = 2/3 * PI * 3.9^3

Volume = 124.174 cubic cm.

Total volume = 84.375 + 425.06 + 124.174 = 633.61 cubic cms.

Volume of cylinder (7.7 – 5.3) = 2.4 cm high

  PI * 3.9^2 * 2.4 = 114.623 cubic cm.

Fuel 7.7 cm above vertex = volume of cone and volume of cylinder with fuel = 84.375 + 114.623 = 198.99 = 199 cubic cm.

Took 15 minutes, so 199 / 15 = 13.27 cubic cm per minute.

Fuel left to fill: 633.61 – 199 = 434.61 cubic cm

434.61 cubic cm / 13.27 cubic cm per minute = 32.75 minutes = 33 minutes left.