The diagrams (not drawn to scale) show a rectangular cardboard B and a square C. Jack cut as many squares C as he could from rectangular cardboard B. The remaining part of the rectangular cardboard B is shown in Figure 1.
- What is the length of DE as shown in Figure 1?
- What is the greatest number of squares C that Jack could cut from a rectangular cardboard B?
(a)
Number of squares lengthwise
= 23 ÷ 3
= 7 r 2
Length of DE = 2 cm
(b)
Number of squares breadthwise
= 10 ÷ 3
= 3 r 1
Greatest number of squares
= 7 x 3
= 21
Answer(s): (a) 2 cm; (b) 21