Donya ran a 3k race at a constant speed in 21 minutes 30 seconds. At this speed, how long does it take her to run 1k?
2 answers:
Answer:
7 minutes 10 seconds.
Step-by-step explanation:
Donya ran a 3 k race at a constant speed = 21 minutes 30 seconds
1 minutes = 60 seconds
21 minutes 30 seconds = 21 + (30/60) = 21.5 minutes
At this speed it would take her to run 1 k race
= 7.17 minutes
7.17 minutes = 7 + (0.17 × 60) = 7 minutes 10 seconds
At this speed it takes her 7 minutes 10 seconds to run 1 k race.
You might be interested in
ANSWER
B. 10
EXPLANATION
We need to find the value of x first.
It was given that the perimeter of triangle XYZ is 24.
This means that:
XY+YZ+XZ=24
we substitute the expression in terms of x to get;
This implies that
Divide both sides by 4 to get;
|WY|=|ZX|=13-3=10
"13" or "more than 13" rides will make the weekly unlimited pass more cost effective. A further solution is provided below.
The given values are:
- Base fare per ride = $2.75
- Discount = 5%
- Weekly unlimited Metro Card costs = $32
The Fare after discount will be:
=
=
=
= ($)
hence,
In $32, the minimum number of rides will be:
=
=
or,
= 13
Learn more: