Decrease 2,000 by 20%
To decrease 2,000 by 20%, we need to multiply 2,000 by 0.2 (which is 20% written as a decimal) and then subtract the result from 2,000.
2,000 - (0.2 x 2,000) = 2,000 - 400 = 1,600
So decreasing 2,000 by 20% results in 1,600.
Find the rate percent which will yeild simple interest of 25 naira or 200 naira for 2 and 1/2 year
Let's start with the first scenario:
To find the rate percent that will yield a simple interest of 25 naira for 2 and 1/2 years, we need to use the formula for simple interest:
I = P * R * T
where:
I = interest
P = principal (the amount borrowed or invested)
R = rate of interest (as a decimal)
T = time (in years)
In this case, we know that:
I = 25 Naira
P = unknown
R = unknown
T = 2.5 years
Substituting these values into the formula, we get:
25 = P * R * 2.5
To find R, we need to isolate it on one side of the equation by dividing both sides by (P * T):
R = 25 / (P * 2.5)
We do not have enough information to determine the actual value of P (the principal) for this scenario. Therefore, we cannot calculate the rate of interest directly.
For the second scenario:
To find the rate percent that will yield a simple interest of 200 naira for 2 and 1/2 years, we use the same formula for simple interest:
I = P * R * T
where:
I = 200 Naira
P = unknown
R = unknown
T = 2.5 years
Substituting these values into the formula, we get:
200 = P * R * 2.5
To find R, we need to isolate it on one side of the equation by dividing both sides by (P * T):
R = 200 / (P * 2.5)
We do not have enough information to determine the actual value of P (the principal) for this scenario. Therefore, we cannot calculate the rate of interest directly.
Without knowing the principals for the two scenarios, we cannot calculate the rate percent that will yield the simple interest.
Find the rate percent which will yeild simple interest of 25 naira on 200 naira for 2 and 1/2 year
To find the rate percent that will yield a simple interest of 25 Naira on 200 Naira for 2 and 1/2 years, we can use the formula for simple interest:
I = P * R * T
where:
I = interest (25 Naira)
P = principal (200 Naira)
R = rate of interest (as a decimal, to be found)
T = time (in years, 2.5 years)
Substituting these values into the formula, we get:
25 = 200 * R * 2.5
To find R, we need to isolate it on one side of the equation by dividing both sides by (200 * 2.5):
R = 25 / (200 * 2.5)
R = 0.05
Therefore, the rate percent that will yield a simple interest of 25 Naira on 200 Naira for 2 and 1/2 years is 5% (since 0.05 is equal to 5% as a percentage).
Find the difference between 13⅖ and 2⅓
To find the difference between 13⅖ and 2⅓, we need to convert both mixed numbers into improper fractions and then subtract the second fraction from the first.
13⅖ can be converted to an improper fraction as:
13⅖ = (5x13+2)/5 = 67/5
2⅓ can be converted to an improper fraction as:
2⅓ = (3x2+1)/3 = 7/3
Now, we can subtract 2⅓ from 13⅖
67/5 - 7/3 = (67x3)/(5x3) - (7x5)/(3x5)
= 201/15 - 35/15
= 166/15
Therefore, the difference between 13⅖ and 2⅓ is equal to 166/15. We can also convert it back to a mixed number if required:
166/15 = 11 and 1/15
So, the difference is 11 and 1/15.
The perimeter of a room is 24 cm, if it's length is 8 cm. find its area
Let's start by using the formula for the perimeter of a rectangle:
P = 2L + 2W
where P is the perimeter, L is the length, and W is the width.
We know that the perimeter is 24 cm and the length is 8 cm, so we can substitute these values into the formula and solve for W:
24 = 2(8) + 2W
24 = 16 + 2W
8 = 2W
W = 4
We have found that the width of the room is 4 cm. Now, we can use the formula for the area of a rectangle to find the area:
A = L x W
A = 8 x 4
A = 32
Therefore, the area of the room is 32 square centimeters.