# 2½ inches per minute, 240 inches per hour, 1/4 foot per minute; which is fastest? 2 1/2 inch per min.

240 inch per hour

1/4 foot per min.

Which is faster?

First we need to convert all of the above to the same unit.

We will convert to inch per min.

So we have:

2 1/2 inch/ min

Now we will convert 240 inch /...

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2 1/2 inch per min.

240 inch per hour

1/4 foot per min.

Which is faster?

First we need to convert all of the above to the same unit.

We will convert to inch per min.

So we have:

2 1/2 inch/ min

Now we will convert 240 inch / hour

We know that 1 hour = 60 m.

==> 240 inch / hour = 240 inch / 60 min = (240/60) inch/ min.

==> 240 inch / hour = 4 inch / m

Now we will convert 1/4 foot/ min

We know that:

1 ft = 12 inch

==> 1/4 ft = 12/4 inch

==> 1/4 ft = 3 inch.

==> (1/4) ft / min = 3 inch/ min

Now we will compare:

2/12  < 3 < 4

==> 2 1/2 ich/min <  1/4 ft/min <  240 inch/ hour

Approved by eNotes Editorial Team