Math homework

It took Jose two-thirds of an hour to complete his math homework on Monday, three-fourths of an hour on Tuesday, any two- fifths of an hour on Wednesday. How many hours did it take Jose to complete his homework altogether?

Result

t = 1:49 h

Solution:

$t={\displaystyle \frac{2}{3}}+{\displaystyle \frac{3}{4}}+{\displaystyle \frac{2}{5}}={\displaystyle \frac{109}{60}}=1.81667=1:49\text{ h}$

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