Question

PROBLEM SOLVING ABILITY
0.7- A thin wire 20cm long is formed into a rectangular shape. If the width of this
rectangle is 4cm. Find its length?
(3)
Solution-​

Answer 1

Answer:

2(l+w)=20

                ⇒2[l+4]=20

                ⇒2l+8=20

                ⇒2l=12

                ⇒l=6cm