Start by writing the length of the garden in feet.
15 minutes, see solution.
Practice makes perfect
We know that a snail travels through our garden with a constant speed. A garden is 12 yards long and the snail moves with a speed of 5^(- 2) feet per second. We want to know how much time the snail needs to travel through the length of the garden.
Distance
Rate (Speed)
d =12 yards
r =5^(- 2) feet/second
First, we should express the given values in the same unit. Let's start by writing the length of the garden in feet. Remember the relationship between yards and feet.
1 yard = 3 feetBecause 1 yard is 3 feet, we can rewrite the length of the garden in feet.
12 yards = 12 * 3 feet
Let's evaluate this expression!
Having the length of the garden in feet, we can calculate the time it takes the snail to travel through the length of the garden. To find the time we will use the distance-time equation.
Words
Symbols
distance = rate * time
d = r * t
In our case distance d is 36 feet and rate, or speed, r is 5^(- 2) feet per second. We can substitute these values into the formula and solve for t. Let's start by rewriting the negative exponent!
We found the time in seconds but we need to express it in minutes. Recall that each 60 seconds is 1 minute. If we divide the number of seconds the snail needs to travel through the garden by 60, we will find its time in minutes.
900 seconds = 900/60 minutes
Let's evaluate this quotient!
