Mow the lawn

Dano would mow the lawn in 12 hours and Milada in 16 hours. How long will take the lawn mow together?

Result

t =  6.857 h

Solution:

x=1/12+1/16=7480.1458 t=1/x=1/0.1458=4876.8571=6.857  h x = 1/12+1/16 = \dfrac{ 7 }{ 48 } \doteq 0.1458 \ \\ t = 1/x = 1/0.1458 = \dfrac{ 48 }{ 7 } \doteq 6.8571 = 6.857 \ \text{ h }



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