Hello! Please help, I ask it is very necessary, thanks in advance. Olya for an hour paints 1 m of apartment of a back of a scene, and Oksana - 2 sq.m. How many square meters, working together, will they paint in 3 hours? For how many days working together, they will paint a back of a scene of 60 m of apartment if work every day for 4 hours?

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5 hours they will paint a wall back in 60м^21) 1+2=3 (m²) - they paint together for 1 hour 2) 3*3=9 (m²) - they paint together in 3 hours. 3) 3*4=12 (m²) - they paint together in 4 hours. 4) 60:12=5 (h) - they will paint a back of a wall 60 m long². Answer: 5 hours they will paint a back of a wall 60 m long²
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Answer add