Question

4
a snail moves 5 feet in 2 minutes.

what is its speed in centimeters per minute? use 1 foot ≈ 30\frac{1}{2} centimeters.

a. 76\frac{1}{4}
b. 3\frac{1}{20}
c. 152\frac{1}{2}
d. 2\frac{1}{2}

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Explanation:

Step1: Convert feet to centimeters

First, find out how many centimeters are in 5 feet. Given that 1 foot $\approx 30\frac{1}{2}$ centimeters, which is $\frac{61}{2}$ centimeters. So for 5 feet, we calculate $5\times\frac{61}{2}=\frac{305}{2}$ centimeters.

Step2: Calculate speed in cm per minute

The snail moves this distance in 2 minutes. To find the speed (distance per minute), we divide the total centimeters by 2. So speed $=\frac{305}{2}\div2=\frac{305}{2}\times\frac{1}{2}=\frac{305}{4}=76\frac{1}{4}$ centimeters per minute.

Answer:

A. $76\frac{1}{4}$