Home
Class 8
MATHS
Find the length and perimeter of a recta...

Find the length and perimeter of a rectangle, whose area = 120 `cm^(2)` and breadth = 8 cm.

Text Solution

AI Generated Solution

The correct Answer is:
To solve the problem of finding the length and perimeter of a rectangle given its area and breadth, we can follow these steps: ### Step-by-Step Solution: 1. **Understand the Formula for Area of a Rectangle**: The area \( A \) of a rectangle is given by the formula: \[ A = \text{Length} \times \text{Breadth} \] 2. **Substitute the Given Values**: We know the area \( A = 120 \, \text{cm}^2 \) and the breadth \( B = 8 \, \text{cm} \). We can substitute these values into the area formula: \[ 120 = \text{Length} \times 8 \] 3. **Solve for Length**: To find the length \( L \), we can rearrange the equation: \[ L = \frac{120}{8} \] Now, perform the division: \[ L = 15 \, \text{cm} \] 4. **Calculate the Perimeter**: The perimeter \( P \) of a rectangle is given by the formula: \[ P = 2 \times (\text{Length} + \text{Breadth}) \] Substitute the values of length and breadth: \[ P = 2 \times (15 + 8) \] Calculate the sum inside the parentheses: \[ P = 2 \times 23 \] Now, perform the multiplication: \[ P = 46 \, \text{cm} \] ### Final Answers: - Length of the rectangle: \( 15 \, \text{cm} \) - Perimeter of the rectangle: \( 46 \, \text{cm} \)
Doubtnut Promotions Banner Mobile Dark
|

Topper's Solved these Questions

  • AREA OF A TRAPEZIUM AND A POLYGON

    ICSE|Exercise EXERCISE 20(C )|14 Videos
  • AREA OF A TRAPEZIUM AND A POLYGON

    ICSE|Exercise EXERCISE 20(D)|21 Videos
  • AREA OF A TRAPEZIUM AND A POLYGON

    ICSE|Exercise EXERCISE 20(A)|16 Videos
  • ALGEBRAIC EXPRESSIONS

    ICSE|Exercise Exercise 11(E)|15 Videos
  • CONSTRUCTION (USING RULER AND COMPASSES ONLY)

    ICSE|Exercise EXERCISE 18(D)|10 Videos

Similar Questions

Explore conceptually related problems

Find the perimeter of a rectangle whose area is 500 c m^2 and breadth is 20cm.

Find the perimeter of a rectangle whose area is 650\ c m^2 and its breadth is 13cm.

Knowledge Check

  • Find the Area of a rectangle whose length is 25 cm and breadth is 18 cm.

    A
    `550 cm^(2)`
    B
    `450 cm^(2)`
    C
    `550 cm^(2)`
    D
    `750 cm^(2)`
  • Find the perimeter of a chart paper whose length is 24 cm and breadth is 17 cm.

    A
    `79 cm`
    B
    `82 cm`
    C
    `80 cm`
    D
    `68 cm`
  • Find the perimeter of the rectangle whose length is of 15 cm and width is of 8 cm

    A
    46 cm
    B
    23 cm
    C
    35 cm
    D
    48 cm
  • Similar Questions

    Explore conceptually related problems

    Find the perimeter of a rectangle with length 8.2 cm and breadth 6 cm.

    Find the perimeters of : A rectangle of length 12 cm and breadth 7.5 cm .

    Find the area of a rectangle whose length is 5.7 cm and breadth is 3.5 cm.

    Find the perimeter and area of a rectangle of length 16 cm and breadth 12.5 cm .

    Find the area of rectangle whose length is 5.7cm and breadth is 3 cm.