Question

Shalini has to cut out circles of diameter 5/4cm
From an aluminium .strip of dimensions 35/4 cm
By5/4cm . How many full circles can Shalini cut?
Also calculate the wastage
Of the aluminium strip.

Answer 1

Solution:-

Given:

Circle diameter = 1 1/4 cm

a luminum strip = 8 3/4 cm by 1 1/4 cm

area of aluminum strip = 35/4 cm × 5/4 cm = 35×5 / 4×4 = 175/16 cm²

area of circle = 3.14 × (5/4cm)² = 3.14 × 25/16 cm² = 78.5/16 cm²

175/16 cm² ÷ 78.5/16 cm² = 175/16 × 16/78.5 = 175/78.5 = 2 18/78.5

Shalini can cut 2 full circles.

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@GauravSaxena01

Answer 2

Answer:

Question:-

the length of a rectangle is 8m more than its breadth if its perimeter is 128m, find its length , breadth and Area

Answer:-

The length of Rectangle is 36 m

The breadth of rectangle is 28 m

The area of Given rectangle is 1008 m².

To find:-

Length and breadth of rectangle

Area of rectangle

Solution:-

Let the breadth be x

Length = 8 + x

Perimeter = 128 m

$\boxed{ \large{ \mathfrak{perimeter = 2(l + b)}}}$

According to question,

$\large{ \tt: \implies \: \: \: \: \: 2(8 + x + x) = 128}$

$\begin{gathered} \large{ \tt: \implies \: \: \: \: \: 8 + 2x = \frac{128}{2} } \\ \end{gathered}:$

$\large{ \tt: \implies \: \: \: \: \: 8 + 2x = 64}$

$\large{ \tt: \implies \: \: \: \: \: 2x = 64 - 8}$

$\large{ \tt: \implies \: \: \: \: \: 2x = 56}$

$\large{ \tt: \implies \: \: \: \: \: x = 28}$

The breadth of rectangle is 28 m

Length = 8 + x = 28 + 8 = 36 m

$\large{ \boxed{ \mathfrak{area = l \times b}}}$

$\large{ \tt: \implies \: \: \: \: \: area = 28\times 36}$

$\large{ \tt: \implies \: \: \: \: \: area = 1008 \: {m}^{2} }$

The area of Given rectangle is 1008 m².