Answer :

Length of rectangle = 40cm

Diagonal = 41 cm

\(Breath^2 = 41^2 - 40^2 \)

Or, \( breath^2= 1681 – 1600 \)

Or, breath = \(\sqrt{81} \) cm

Breath = 9 cm

Perimeter of rectangle = 2×(40+9) = 2×49 = 98 cm

- Q.1 PQR is a triangle, right-angled at P. If PQ = 10 cm and PR = 24 cm, find QR.
- Q.2 ABC is a triangle, right angled at C. If AB = 25 cm and AC = 7 cm, find BC.
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- Q.8 The diagonals of a rhombus measure 16 cm and 30 cm. Find its perimeter.

- NCERT solutions for class 7 maths chapter 1 Integers
- NCERT solutions for class 7 maths chapter 2 Fractions and Decimals
- NCERT solutions for class 7 maths chapter 3 Data Handling
- NCERT solutions for class 7 maths chapter 4 Simple Equations
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- NCERT solutions for class 7 maths chapter 11 Perimeter and Area
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- NCERT solutions for class 7 maths chapter 14 Symmetry
- NCERT solutions for class 7 maths chapter 15 Visualising Solid Shapes

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- NCERT solutions for class 7 science chapter 2 Nutrition In Animals
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- NCERT solutions for class 7 science chapter 4 Heat
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