a rectangle is 8 cm long and b cm broad find the range of values of beef if the perimeter of the rectangle is not greater than 50 cm and not less than 18 cm
p = 2(8+b)
so
18 <= 2(8+b) <= 50
18 <= 16+2b <= 50
2 <= 2b <= 34
1 <= b <= 17
so
18 <= 2(8+b) <= 50
18 <= 16+2b <= 50
2 <= 2b <= 34
1 <= b <= 17