The diagrams (not drawn to scale) show a rectangular cardboard D and a square E. Ken cut as many squares E as he could from rectangular cardboard D. The remaining part of the rectangular cardboard D is shown in Figure 1.
- What is the length of FG as shown in Figure 1?
- What is the greatest number of squares E that Ken could cut from a rectangular cardboard D?
(a)
Number of squares lengthwise
= 39 ÷ 5
= 7 r 4
Length of FG = 4 cm
(b)
Number of squares breadthwise
= 18 ÷ 5
= 3 r 3
Greatest number of squares
= 7 x 3
= 21
Answer(s): (a) 4 cm; (b) 21