Finding the surface Area

formula= 2 l x w + 2 l x h + 2 (wxh)

length - 4 cm unit

width- 3 unit cm

height - 2 cm unit


Pairs of match faces 3


  • front and back = 4×2 = 8 × 2 = 16 which is length x width

  • Top and bottom = 4 × 3 = 12 × 2 = 24 which is width x height

  • Left and right = 3×2 = 6 × 2 = 12

24+12+16= 52 sq unit


Formula - Sa = 2 Lw + 2lh + 2wh


Top and bottom = 3cm x 4cm = 12 cm x 2

Front and back = 3cm x 5cm = 15 cm x 2

Left and Right = 4 cm x 5cm = 20 cm x 2