A wheel makes 7 710 revolutions per minute If it rotates for

A wheel makes 7 7/10 revolutions per minute. If it rotates for 55 minutes, how many revolutions does it make? Simplify the answer, whole number, proper fraction or mixed number.

Solution

given that wheel makes 7 7/10 revolutions per minute.

if wheel rotates for 55 minutes,then total number of revolutions = 55(7 7/10) revolutions

implies (55)(77/10) = (11)(77/2)

implies (847/2) = 423 1/2 revolutions