Question

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Answer 1

Answer:

27.5 cm²

Step-by-step explanation:

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Answer 2

★ Given:-

• A horse is placed for grazing inside a rectangular park 70 m by 52 m.
• It is tethered to one corner of a rope 35 m long.

★ To Find:-

The area which the horse can graze.

★ Solution:-

Note: Refer to the attachment for better understanding

Shaded portion shows the area where horse can graze.

The area is

${\large{{\tt{\frac{1}{4} }}}}$

of a circle radius 35 m

Area which the horse can graze = $\large{{{\sf{\frac{1}{4} \pi{r}^{2} }}}}$

$= {{{\sf{ \frac{1}{4} \times \frac{22}{7} \times 35 \times 35 \: sq.m }}}}$

= 962.50 sq. m

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Important Formulas:-

★ Area of a square = side × side = (side)²

★ Area of a rectangle = Length × breadth = l × b

★ Area of a circle = π × (Radius) = πr²

$\small{{{\sf{ π = \frac{22}{7} }}}}$

★ Surface area of a cylinder = 2π × Radius × height = 2πrh

★ Surface area of a sphere = 4π × (Radius)² = 4πr²