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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

Respuesta :

Answer:

4 1/2 hours

Step-by-step explanation:

Pragnesh = 30 minutes

Qazi = 1 1/2 hours

Ronghui = 2 1/2 hours

add them and that gets you 4 1/2 hours. You can also check this yourself by putting this in the number problem. :)  

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