Page 20 - Focus KSSM SPM 2021 TG4.5 - Maths DLP

Mathematics SPM Chapter 6 Linear Inequalities in Two Variables
(b) Using a scale of 2 cm to 10 units on both axes, (a) Write a system which consists of three linear
construct and shade the region that satisfies inequalities, other than x  0 and y  0 that
the system of linear inequalities. represent the situations above.
(c) From the graph, can the factory produces 20 (b) Using a scale of 2 cm to 10 m on both axes,
units of tables and 20 units of cupboards in a construct and shade the region that satisfies
day? Explain your answer. the system of linear inequalities.
(c) Ahmad fences the land with a width of 32 m.
13. Ahmad wanted to fence a rectangular land with (i) Find the length of the land so that the area
width of x m and length of y m. The installation of is maximum.
this fence should follow the conditions below. (ii) Given that the price of the fence is RM5
HOTS per metre, calculate the maximum cost of
Applying the installation.
(i) The total length of the fence shall be less than
140 m. Form 4
(ii) The width of the fence shall not exceed twice
the length of the fence.
Form 4
(iii) The length of the fence shall not exceed the
wide of the fence by 20 m.

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06 Focus SPM Maths F4.indd 100 17/02/2021 5:24 PM