Question

3. The length and breadth of a rectangle are 6.5 cm and 3.4 cm, respectively, its perimeter is

.....

a) 19.8 cm2

b) 9.9 cm2

c) 9.9 cm

d) 19.8 cm

Answer 1

Answer:

Here is your answer ⬇️⬇️⬇️

Step-by-step explanation:

Length = 5.7 ± 0.1 cm

breadth = 3.4 ± 0.2 cm

A = Lb

= (5.7 × 3.4)

= 19.38 cm²

ΔA = A × (ΔL/L + Δb/b)

= 19.38 × (0.1/5.7 + 0.2/3.4)

= 1.48 cm²

Area of rectangle = (19.38 ± 1.48) cm²

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Answer 2

Answer:

perimeter of rectangle = 2( l + b )

= 2× (6.5 + 3.4)

= 2 × 9.9

= 19.8 cm

perimeter is always in cm

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