Question

A play ground 60 m × 40 m is extended on all sides by 3 m. What is the extended area.

Answer 1

area of original play ground = 60*40 = 2400m2
area of new playground = 63 *43 ( since extended by 3m ) = 2709m2

extended area = 2709 - 2400 = 309m2

Answer 2

area of the play ground=l*b
                                     =60*40
                                     =2400m2

lenght of the extended path along the lenght=60+(3+3)   
                                                                       =66m

breadth of the extended path along the breadth=40+(3+3)
                                                                            =46m

area of both extended area and play ground =46*66 
                                                                         =3036m2
area of the extended path=area of both  - area of play ground
=3036-2400
=636m2