a wall 15m long,30cm wide and 4m high is made of bricks,each measuring (22cm, 12.5cm, 7.5cm). if 1/12 if total volume of the wall consist of morter, how many bricks are there in wall?

Asked by 2002rishabhverma | 25th Oct, 2015, 12:45: PM

Expert Answer:

L e n g t h space o f space t h e space w a l l equals 15 space m W i d t h space o f space t h e space w a l l equals 30 space c m equals 30 over 100 space m equals 0.3 space m H e i g h t space o f space t h e space w a l l equals 4 space m V o l u m e space o f space t h e space w a l l equals 15 cross times 0.3 cross times 4 equals 18 space m cubed G i v e n space t h a t space h a l f space o f space t h e space t o t a l space v o l u m e space o f space t h e space w a l l space c o n s i s t space o f space m o r t a r. T h u s comma space t h e space v o l u m e space o f space t h e space t o t a l space b r i c k s space i n space t h e space w a l l equals 18 over 2 equals 9 space m cubed L e n g t h space o f space a space b r i c k equals 22 space c m equals 22 over 100 space m equals 0.22 space m W i d t h space o f space a space b r i c k equals 12.5 space c m equals fraction numerator 12.5 over denominator 100 end fraction space m equals 0.125 space m H e i g h t space o f space a space b r i c k equals 7.5 space c m equals fraction numerator 7.5 over denominator 100 space end fraction space m equals 0.075 space m V o l u m e space o f space a space b r i c k equals 0.22 cross times 0.125 cross times 0.075 space m cubed N u m b e r space o f space b r i c k s equals fraction numerator V o l u m e space o f space a l l space b r i c k s over denominator V o l u m e space o f space a space b r i c k end fraction equals fraction numerator 9 over denominator 0.22 cross times 0.125 cross times 0.075 end fraction almost equal to 4363 N u m b e r space o f space b r i c k s equals 4363

Answered by Vimala Ramamurthy | 25th Oct, 2015, 06:09: PM