to construct a wall 25m long, 0.3m thick 6m high, bricks of dimensions 50cm x 15cm x 10cm each are used. if the mortar occupies 1/10th of the volume of wall, find the number of bricks used.

Volume of cuboidal wall = l*b*h = 25*0.3*6= 45 m³= 45000000 cm³
Volume of cuboidal brick= l*b*h= 50*15*10=7500 cm ³
Volume occupied by mortar = 1/10 th of volume of wall
                                             = 4500000 cm ³
Volume left for bricks = 45000000-4500000= 40500000 cm ³
no. of bricks to be used= 40500000/7500= 5400 bricks

answer:- 5400 bricks  

 

Volume of cuboidal wall = l*b*h = 25*0.3*6= 45 m3= 45000000 cm3
Volume of cuboidal brick= l*b*h= 50*15*10=7500 cm?3
Volume occupied by mortar = 1/10 th of volume of wall
? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?= 4500000 cm?3
Volume left for bricks = 45000000-4500000= 40500000 cm?3
no. of bricks to be used= 40500000/7500= 5400 bricks

answer:- 5400 bricks??