Rectangular wall MNOP of a kitchen is covered with square tiles of 15cm length (Fig. 6.19). Find the area of the wall.

Number of square tiles = 28

Length of square tile = 15 cm.

Area of square tile = 15 × 15

= 225 sq.cm

Area of 28 tiles = 225 × 28

= 6300 sq.cm

Area of wall = 6300 sq.cm