Write down your answer to part (a) correct to the nearest integer.

In the context of this model, state what the value of 19 represents.

Verify that the point $\text{P}(1, -2, 0)$ lies on both $\prod _1$ and $\prod _2$.

Write down the value of x.

Find the height of the pyramid, $\text{VX}$.

A second ornament is in the shape of a cuboid with a rectangular base of length $2x \text{cm}$, width $x \text{cm}$ and height $y \text{cm}$. The cuboid has the same volume as the pyramid.

The cuboid has a minimum surface area of $S {\text{cm}}^2$. Find the value of $S$.

Find the value of $a$.

Calculate the length of AE.

The sphere is to be melted down and remoulded into the shape of a cone with a height of 14.8 cm.

Find the radius of the base of the cone, correct to 2 significant figures.

Calculate the radius of the balloon following this increase.

Find a vector equation of $L$, the line of intersection of $\prod _1$ and $\prod _2$.

Find the distance between $L$ and $\prod _3$.

Find the cost of $100\text{ c}{\text{m}}^3$ of chocolate mousse.

Write down the radius of the planet.

The volume of the planet can be expressed in the form $\mathrm{\pi }\left(a\times {10}^k\right) {\text{km}}^3$ where $1\le a<10$ and $k\in \mathrm{\mathbb{Z}}$.

Find the value of $a$ and the value of $k$.

Hence, find the volume of the cone.

Show that the three planes do not intersect.

Find $\text{AV}$.

Calculate the length of MN.

Find the maximum number of complete panels that can be fitted to the whole roof.

Find the value of $x$.

Write down an equation for the area, $A$, of the curved surface in terms of $r$.

Find the slant height of the cone-shaped container.

Calculate the volume of this hemisphere in cm³.

Give your answer correct to one decimal place.

Find the slant height, $l$, of the cone.

Calculate James’s estimate of its volume, in ${\text{km}}^3$.

Write down the value of the iron in the form $a\times {10}^k$ where $1\le a<10 , k\in \mathrm{\mathbb{Z}}$.

Calculate the volume of this pan.

Express this volume in $\text{c}{\text{m}}^3$.

Write down, in terms of $r$ and $h$, an equation for the volume of this water container.

Find $\frac{\text{d}A}{\text{d}r}$.

Using your answer to part (e), find the value of $r$ which minimizes $A$.

Find the volume of the sphere expressing your answer in the form $a\times {10}^k$, and $k\in \mathbb{Z}$.

Calculate the radius of the base of the cone which has been removed.

The actual volume of the asteroid is found to be $6.074\times {10}^6 {\text{km}}^3$.

Find the percentage error in James’s estimate of the volume.

The total external surface area of the pencil case rounded to 3 significant figures is 570 cm².

Using your graphic display calculator, calculate the value of r.

Find the value of $l$.

Calculate the radius, $r$, of a hemisphere shaped glass.

Calculate the volume of the balloon.

Find the volume, in cm³, of this calculator case.

1 cm³ of glass has a mass of 2.56 grams.

Calculate the mass, in grams, of the paperweight.

Find the value of $h$.

Find the volume of water in the container.

Find the value of $r$ when the area of the curved surface is maximized.

Find an expression for the slant height of the cone in terms of r.

Show that the volume of a cone shaped glass is $160\text{ c}{\text{m}}^3$, correct to 3 significant figures.

Calculate the curved surface area of the cone which has been removed.

Find the temperature that the pizza will be 5 minutes after it is taken out of the oven.

Find the radius, $r$, of the circular base of the cone.

Find the curved surface area of the cone.

Calculate the curved surface area of the remaining solid.

Show that Farmer Brown is incorrect.

Show that there is $20\text{ c}{\text{m}}^3$ of orange paste in each special dessert.

Show that $A=\pi r^2+\frac{1000000}{r}$.

Find the value of this minimum area.

Find $\frac{\text{d}A}{\text{d}r}$.

Calculate the volume of the paperweight.

Find the length $\text{AB}$, giving your answer to four significant figures.

Find the total area of the two rectangles that make up the roof.

Find the percentage error in her estimate.

Olivia investigates arranging the panels, such that the longer edge of each panel is parallel to $\text{AB}$ or $\text{AC}$.

State whether this new arrangement will allow Olivia to fit more solar panels to the roof. Justify your answer.

Find the radius of the sphere in cm, correct to one decimal place.

Calculate, to the nearest second, the time since the pizza was taken out of the oven until it can be eaten.

Write down a formula for $A$, the surface area to be coated.

Find the least number of cans of water-resistant material that will coat the area in part (g).

Show that the total surface area of the cone-shaped container is 314 cm², correct to three significant figures.

Find the height, $h$, of this cylinder-shaped container.

Find the volume of one cone-shaped container.

The factory director wants to increase the volume of coconut water sold per container.

State whether or not they should replace the cone-shaped containers with cylinder‑shaped containers. Justify your conclusion.

Calculate the area of triangle EAD.

Calculate the total volume of the barn.

Calculate the total length of metal required for one support.

Find the total cost of the ingredients of one special dessert.