Question

From a circular card sheet radius 3.5cm and a rectangle of length of 3 cm and breadth 1cm are removed . find the area of the remaining sheet . (take π 22/7) .as shown in the adjoining figure .​

Answer 1

Step-by-step explanation:

according according to the question,

area of circle πr². value of Pi 22/7

therefore,

there is two circle inside the circular card sheet that means,

22/7×3.5×3.5= 38.5+38.5 = 77cm² [because there is two circle inside the circular card sheet ]

therefore,

area of rectangle= length ×breath

therefore,

3cm× 1cm= 3cm²

now,

total area covered by circle and rectangle is

=. 77cm²+3cm²

= 80cm²

therefore,

now we don't find the area of the remaining sheet because there is no radius of circular cardboard

Answer 2

Remaining area = Area of larger circle-2×area of smaller circles-area of triangle

Area of larger circle = 22/7 × 14×14 = 616cm²

Area of smaller circle =22/7×3.5×3.5 =38.5cm²

Area of rectangle =l×b=3×1=3cm²

Therefore,

Remaining area =616cm²-2×38.5cm²-3cm²=536cm²

Remaining area is 536cm²