Question

area of a rectangle with length (4x-1)cm and width 2xcm is 10cm². Determine the:
a)Value of x b)Its length and width c)Its perimeter

Answer 1

a) area of rectangle=l×b=10cm2
2x ×(4x-1) = 8x-2x=10cm2
8x-2x=10cm2
6x=10cm2
x=10/6
x=5/3

b)if x=5/3
length=(4x-1)                                  width=2x
4×5/3-1                                                    =2×5/3
20/3-3/3                                                   =10/3
17/3

c)2(l+w)
  2×(17/3+10/3)
  2×9
  18