Question 1202875
<br>
Note the wording in the statement of the problem does not correctly convey the intended information:<br>
"...spent the rest of the 20 minutes on..."<br>
That is surely supposed to say<br>
"...spent the remaining 20 minutes on..."<br>
Getting past the sloppy wording......<br>
After the English homework, he spent half of the remaining time on Science homework.  That means the remaining 20 minutes that he spent on Math homework were the other half of the time remaining after the English homework.<br>
So he spent a total of 40 minutes on the Science and Math homework.<br>
He spent 2/3 of his total time on his English homework, so the 40 minutes he spent on Science and Math was 1/3 of the total time.<br>
So he spent a total of 3(40) = 120 minutes on his homework, which means he spent 120-40 = 80 minutes on English homework.<br>
ANSWER: 80 minutes<br>