Question

A) write an expression for the perimeter of the rectangle

k
k+5
) Find the value of k, when Perimeter = 50cm
(2)
cm (2)

Answer 1

a. write an expression for the perimeter

perimeter of rectangle = 2(length x width)

= 2[(k+5)+(k)]

=> 2k + 10 + 2k

= 4k + 10

so, a = 4k + 10

b. find the value of k

=> 4k + 10 = 50

4k + 10 - 10 = 50 - 10

4k = 40

k = 40/4

= 10

so, b = 10 cm

i suck at explaining but i hope it make sense