Math homework to finish

Question

Gavin and Holly are doing their math homework. Their teacher gave them each 24 pages of math facts to practice. Each page has 7 rows and 8 columns of problems. Gavin can do a row of problems in about 7.4 seconds. Holly is faster. She can do a row of problems in 6.7 seconds.

How much more time will Gavin need to finish his math homework?

Answer 1

Gavin needs 0.7 seconds more per row

Gavin needs (0.7)(7) or 4.9 seconds more per page

Gavin needs (4.9)(24) or 117.6 seconds more per assignment.