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Answers
Answer:
\large{ \underline{ \underline{ \red{\tt{Answer \: (1)}}}}}
Answer(1)
Given :
Length of the rectangle = 12 cm
Breadth of the rectangle = 10 cm
To Find :
Area and perimeter of the rectangle.
Formulae used :
For calculating the area of rectangle, formula is given by,
\boxed{ \bf{Area_{(Rectangle)} =l \times b}}
Area
(Rectangle)
=l×b
For calculating the perimeter of rectangle, formula is given by,
\boxed{ \bf{Perimeter_{(Rectangle)} = 2(l + b)}}
Perimeter
(Rectangle)
=2(l+b)
Here,
{l}l = length
b = breadth
Calculations :
\dag \: { \pink{ \sf{ \underline{ \underline{Calculating \: the \: area \: of \: rectangle :}}}}}†
Calculatingtheareaofrectangle:
Using formula,
\star{\boxed{ \bf{Area_{(Rectangle)} =l \times b}}}⋆
Area
(Rectangle)
=l×b
Putting the values,
\longrightarrow⟶ Area of rectangle = length × breadth
\longrightarrow⟶ Area of rectangle = 12 × 10 cm
\longrightarrow⟶ Area of rectangle = 120 cm²
Hence, area of rectangle is 120 cm².
\dag \: { \pink{ \sf{ \underline{ \underline{Calculating \: the \: perimeter \: of \: rectangle :}}}}}†
Calculatingtheperimeterofrectangle:
Using formula,
\star{\boxed{ \bf{Perimeter_{(Rectangle)} = 2(l + b)}}}⋆
Perimeter
(Rectangle)
=2(l+b)
Putting the values,
\longrightarrow⟶ Perimeter of rectangle = 2 (l + b)
\longrightarrow⟶ Perimeter of rectangle = 2 (12 + 10)
\longrightarrow⟶ Perimeter of rectangle = 2 × 22
\longrightarrow⟶ Perimeter of rectangle = 44 cm
Hence, the perimeter of rectangle is 44 cm.
____________________________________
\large{ \underline{ \underline{ \red{\tt{Answer \: (2)}}}}}
Answer(2)
Given :
Number of boys in class = 20 Boys
Number of girls in class = 15 girls
To Find :
Ratio of girls to boys
Boys to whole class
Calculations :
\underline{ \underline{ \bf{ \purple{1) \: Ratio \: of \: girls \: and \: boys \: - }}}}
1)Ratioofgirlsandboys−
Given that,
• Number of girls = 15 girls
• Number of boys = 20 boys
Now, according to the question, let's find the ratio of girls to Boys.
→ Number of boys : Number of girls
Now, evaluating,
\longrightarrow⟶ 20 : 15
\longrightarrow⟶ 20/15
Cancelling the numbers and converting in simplest form,
\longrightarrow⟶ 4/3
In ratio,
\longrightarrow⟶ 4 : 3
Therefore, ratio of girls to Boys is 4 : 3.
\underline{ \underline{ \bf{ \purple{2) \: Ratio \: of \: boys \: to \: whole \: class - }}}}
2)Ratioofboystowholeclass−
• Total number of students = 35 students
→ 15 + 20
→ 35 students
And, number of boys is 20 Boys.
\longrightarrow⟶ 20 : 35
\longrightarrow⟶ 20/35
Cancelling the numbers and converting in simplest form,
\longrightarrow⟶ 4/7
In ratio,
\longrightarrow⟶ 4 : 7
Therefore, ratio of boys to whole class is 4 : 7.
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