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Four cubes of edge 5 cm each are placed side by side and stuck together . If the outer surface alone is painted at Rs 300 per meter square , find the cost of painting

Asked by deepikankur 17th March 2018, 6:55 PM
Answered by Expert
begin mathsize 16px style According space to space the space question space if space 4 space cubes space of space 5 space cm space are space joined
then space length space of space cuboid space is space 5 cross times 4 equals 20 space cm space equals straight l
breadth equals 5 space cm equals straight b space and space height equals 5 space cm equals straight h
Total space surface space area space of space cuboid equals 2 open parentheses lb plus bh plus hl close parentheses
equals 2 open parentheses 20 cross times 5 plus 20 cross times 5 plus 5 cross times 5 close parentheses
equals 450 space cm squared
The space cost space of space painting space 1 space sq. space straight m equals Rs. space 300
The space cost space of space painting space the space cuboid equals 450 cross times 300
equals Rs. space 135000
end style
Answered by Expert 19th March 2018, 11:06 AM
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