Sixth Grade Challenging Math

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6-48)   Answer

                          6.7 min.

Solution: First find out how many bugs 1 hen can eat in 1 minute.

1 hen can eat 15 bugs in 5 min.(60/4= 15 bugs)

1 hen can eat 3 bugs in 1 min. (15/5=3 bugs)

1 hen needs to eat 20 bugs. (40/2=20 bugs)

It takes 1 hen 6.7 min. to eat 20 bugs. (20/3=6.7 min.)

Therefore it takes 6.7 minutes for 2 hens to eat 40 bugs.