One man want to build a wall .The length and breadth of the wall are 20 and 30 respectively. He need 35 bricks for one square centimeter then how many bricks he need?
a)21,500 b)30,000 c)21,000 d)20,000

• let area of wall 20*30
  then its 600 square cms
  now i square cm is 35t bricks then
  600 will be 600*35 is 21000
• 13 years agoHelpfull: Yes(28) No(2)
• length of wall = 20,
  breadth of wall = 30,
  Then Area of wall = length * breadth=20*30=600 square centimeters,
  by hypothesis, 35 bricks for one square centimeter.
  so, For 600 square centimeters = 600*35=21,000
  Hence, correct option is 'c'
• 13 years agoHelpfull: Yes(14) No(1)
• 21000
• 13 years agoHelpfull: Yes(4) No(1)
• 21000
• 13 years agoHelpfull: Yes(3) No(1)
• 20*30=600*35=21000
• 7 years agoHelpfull: Yes(0) No(0)
• area of the wall= 20cmx30cm=600cm^2
  given that for 1cm^2=35bricks
  therefore for 600 cm^2 it requires 600x35=21000 bricks
• 5 years agoHelpfull: Yes(0) No(0)