25cm
18cm
13cm
9cm
Correct answer is C
perimeter = 2(l + b) = 32
l + b = 322
l + b = 16
b = 16 - 1.......(1)
Area = l + b = 39
lb = 39 .....(2)
put (1) into (2)
l(16 - 1) = 39
16l - l2 = 39
l2 = 13l - 3l + 39 = 0
l(l - 13) - 3(1 - 13) = 0
(l - 3)(l + 130 = 0
l - 3 = 0 or l - 13 = 0
l = 3cm or l = 13cm; The length in 13cm
In the diagram, PQ // SR. Find the value of x ...
If log2y=3−log2x32, find y when x = 4....
Evaluate 2022three−1122three ...
Simplify, correct to three significant figures, (27.63)2 - (12.37)2 ...
What is the total surface area of a cuboid whose dimensions are 12cm × 8cm × 3cm? ...
Expression 0.612 in the form xy, where x and y are integers and y ≠ 0...