Mathematics, 22.11.2020 17:20 belle345
Three students have started a fence-painting business. Working together, Pragnesh and Qazi can paint the fence in 2 hours. Similarly, Pragnesh and Ronghui can paint the fence in 3 hours when they work together. Finally, when Qazi and Ronghui work together, they can paint the fence in 4 hours. How long would it take if all three students worked together to paint the fence.
Answers: 2
of the room
of the room
of the room
of the room each hour. Therefore the whole (1) room would be painted in 1 ÷ 
= 
or 0.92 hours or 55.2 minutes (0.92 * 60).
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Three students have started a fence-painting business. Working together, Pragnesh and Qazi can paint...
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