A can paint ceiling of a room of length 5 cm and breadth 12 cm in 12 hours but B can paint ceiling of a room of length 10 cm and breadth 5 cm in 10 hours. How long A and B together will take to paint ceiling of a room of length 15 cm and breadth 20 cm?
Added by Virginia M.
Step 1
For A, the room has dimensions of 5 cm by 12 cm. So, the area A can paint = length × breadth = 5 cm × 12 cm = 60 cm². For B, the room has dimensions of 10 cm by 5 cm. So, the area B can paint = length × breadth = 10 cm × 5 cm = 50 cm². Show more…
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