71 P4.AN.JM.17092840
Level 3
In the figure, EC is a straight line. ∠ADB is twice as large as ∠BDC but 20° less than ∠ADE. Find ∠ADE.
3 m
Angles on a straight line Model Comparison Model Times-as-many Units method
72 P4.AP.JM.17100174
Level 3
The rectangle, not drawn to scale, has a perimeter of 72 cm. Its length is 3 times as long as the breadth. Find the length of the rectangle.
3 m
Rectangle Model Times-as-many Units method
73 P4.AP.JM.17100198
Level 3
Brandon walked across a rectangular field from V to W to X to Y to Z and covered a distance of 560 m. The length of the field is thrice the breadth. If it cost $5 to cover 1 m2 of the field with grass, how much did it cost to cover the whole field with grass?
3 m
Rectangle Money Model Times-as-many Units method
74 P4.AP.JM.17100175
Level 3
A square of side 6 cm has the same perimeter as a rectangle. Find the area of the rectangle if the length of the rectangle is twice the breadth of the rectangle.
3 m
Square Rectangle Equal stage Model Times-as-many Units method
75 P4.DE.JC.17100401
Level 3
Tank A holds 3 ℓ 485 mℓ of water. Tank B holds twice as much water as Tank A. Find the total amount of water in the 2 tanks. (Give the answer in litres and millilitres.)
3 m
D Multiplication Volume Unit conversion Model Times-as-many Units method
76 P4.AP.JM.17100192
Level 3
The figure is made up of a shaded rectangle inside a square. The length of the square is 10 cm and its area is 5 times the area of the shaded rectangle. What is the breadth of the shaded rectangle if its length is 12 the length of the square?
3 m
Square Rectangle Fraction of a whole Model Times-as-many
77 P4.AN.JM.17092854
Level 3
The figure shows 2 squares ABCD and BECF. ∠GCF is twice as large as ∠GCB.
  1. Name the line that is parallel to AC.
  2. Find ∠FGC.
3 m
Square Angles sum of triangle Model Times-as-many Units method
78 P4.AN.JM.17092860
Level 3
In the figure not drawn to scale, ∠AEB = 90° and ∠AEF = 122°. Given that ∠AED is three times as large as ∠DEF, find ∠AED.
3 m
Angles at a point Model Times-as-many Units method
79 P4.AN.JM.17092859
Level 3
In the figure, AE is perpendicular to BE and ∠CED = 102°. Given that ∠AED is three times as large as ∠BEC, find ∠AED.
3 m
Angles at a point Model Times-as-many Units method
80 P4.AP.JM.17100176
Level 3
The length of a rectangular field is twice that of its width. The width of the field is 28 m. Find
  1. the perimeter of the field.
  2. the area of the field.
3 m
Rectangle Model Times-as-many

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