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In the diagram, rectangle B is an enlargement of rectangle A. The dimensions given are in cm. Find the scale factor of the enlargement in terms of x.

2x+2

In the diagram, rectangle B is an enlargement of rectangle A. The dimensions given are in cm. Hence, calculate the length of the unknown side of rectangle B in terms of x.

(2x^2-2x-4) cm

In the diagram, rectangle B is an enlargement of rectangle A. The dimensions given are in cm. Express area of rectangle B/area of rectangle A in terms of x.

(2x+2)^2

In the diagram, rectangle B is an enlargement of rectangle A. The dimensions given are in cm. Hence, find the ratio of area of rectangle B : area of rectangle A if x=4.

100∶1

A model of a boat is made on a scale of 0.25∶15. Express the scale in the form 1 : n.

1:60

A model of a boat is made on a scale of 0.25∶15. If the actual length of the boat is 7.2 m, find the length of the model in centimetres.

12 cm

A model of a boat is made on a scale of 0.25∶15. Calculate the actual width of the boat if the width of the model is 4.5 cm.

270 cm

A map is drawn to a scale of 1∶2000. The actual height of a tree is 50 m and the area of a plot of land is 10 cm2 on the map. Calculate the height, in cm, of tree on the map,

2.5 cm

A map is drawn to a scale of 1∶2000. The actual height of a tree is 50 m and the area of a plot of land is 10 cm2 on the map. Calculate the actual area, in m2, of the land.

4000 m2