+0  
 
0
577
1
avatar

rectangular block -

volume: 126m3 

length: 7m

breadth: 6m

height: 3m

question: a litre of paint can cover 20m2. how many litres of paint will it take to paint all but (except) the base of the block?

 Jun 24, 2016
 #1
avatar+118608 
0

rectangular block -

volume: 126m3 

length: 7m

breadth: 6m

height: 3m

question: a litre of paint can cover 20m2. how many litres of paint will it take to paint all but (except) the base of the block?

 

 

Sides are 7m by 6m and the height is 3m

 

So areas

long side     A=7*3=21m^2

other long side     A = 21

short side   A =6*3=18

other short side also 18

top = 7*6=42

 

Total area to be painted = 21+21+18+18+42 = 120m^2

 

120 divided by 20 = 6 cans of paint     

 Jun 24, 2016

2 Online Users

avatar