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The area of a rectangular sheet is 500 cm^{2}. If the length of the sheet is 25 cm, what is its width?
Area = Length × Width
Width = Area / Length
= 500 cm² / (25 cm)
= 20 cm
So option A is the correct answer.
If the area of rectangle increases from 2 cm^{2} to 4 cm^{2} the perimeter will
If the area of rectangle increases from 2 cm^{2} to 4 cm^{2} the perimeter will also increase.
Since it is given that perimeter of a square is 4m
We know that Perimeter of a square = 4a
So, 4a = 4
it implies that a = 1
Area of a square = a^{2}
As a = 1 (as calculated above)
So area of a square = 1 m^{2}
So option B is the correct answer.
Which figure encloses more area: a square of side 2 cm ; a rectangle of side 3 cm and 2 cm ;An equilateral triangle of side 4 cm?
Area of a square = a^{2} = (2 x 2) cm^{2}
= 4 cm^{2}
Area of rectangle = L X B
= (3 x 2 ) cm^{2}
= 6 cm^{2}
Area of an equilateral triangle = root 3/4 .a^{2}
= root 3/4 × (4)^{2}
= 1.732 / 4 × 16
= 0.433 × 16
= 6.928 cm^{2}
Since the area of an equilateral triangle is more than area of a square and rectangle. So equilateral triangle encloses more area
So option A is the correct answer.
The area of rectangle whose length is 15 cm and breadth is 6 m
Area of a rectangle is Length x Breadth
Here Length is 15 cm and Breadth is 6 m
We know that 1 m = 100 cm
So 6 m = 600 cm^{2}
So area of a rectangle =(15 x 600 ) cm^{2}
^{ }= 9000 cm^{2}
By converting 0.96km² into m²(meter square), answer will be
1 Square kilometer is equal to 1000000 square meters
therefore,
0.96km² = 960000m^{2}
The area of parallelogram is base × height
So option B is the correct answer.
Since area of parallelogram is base × height
So to find Base of parallelogram the formula is = Area of parallelogram / Height
So option A is the correct answer.
Since Area of parallelogram is base × height
So Height = Area of parallelogram / Base
So option A is the correct answer.
Area of parallelogram = Base × Height
Find the area of a triangle with a base of 20 cm and a height of 30 cm
We Know, Area of a triangle is bxh/2
where b is base and h is height
Given that base is 20cm and height is 30cm
So Area of a triangle 20 cm x 30cm / 2
= 600 cm^{2}/2
= 300 cm^{2}
So option A is the correct answer.
The formula to calculate the area of a circle is
A=πr^{2}
This means that if r=5cm, the area is
A=52π cm^{2}=25π cm^{2}≈78.539816 cm^{2}
Find the perimeter of a square with one side equals to 7cm
We know Perimeter of a square is 4a
= 4 x 7cm
= 28 cm
Find the perimeter of a triangle with sides 4 cm, 6 cm and 10 cm
Perimeter = Sum of all the sides
Perimeter of a triangle = a+b+c
Here a = 4cm , b = 6cm , c =10cm
(6+4+10)cm=20cm
So option A is the correct answer.
Find the perimeter of the quadrilateral with sides 5 cm, 7 cm, 9 cm and 11 cm.
The sum of the length of all the four sides of the quadrilateral is called the perimeter of the quadrilateral.
Here the lengths of all the four sides are 5 cm, 7 cm, 9 cm and 11 cm.
Therefore, perimeter of quadrilateral = 5 cm + 7 cm + 9 cm + 11 cm = 32 cm
So option A is the correct answer.
Find the area and perimeter of a rectangle whose breadth is 4 cm and the height 3 cm.
Area = b×h = 4×3 = 12 cm^{2}.
Perimeter = 2(b) + 2(h) = 2(4) + 2(3) = 8 + 6 = 14 cm
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