Question

7. From a circular sheet of radius 4cm. A circle of radius 3cm is cut out. Calculate the area of the remaining sheet after
the smaller circle is removed.​

Answer 1

Answer:

2 cm

Step-by-step explanation:

first 4-3=2

4cm-3cm=2cm

Answer 2

✰ Gɪᴠᴇɴ :-

• Radius (R) of large circle = 4 cm

• Radius (r) of small circle = 3 cm

✰ ᴛᴏ ғɪɴᴅ :-

• Area remaining after the smaller circle is removed from large circle

✰ sᴏʟᴜᴛɪᴏɴ :-

We know that,

➦ Area of Circle = πr²

So,

➠ Area of large Circle = πR²

➠ πR² = π(4)²= 16π

➠ Area of small circle = πr²

➠ πr² = π(3)² = 9π

Now,

➦ Area of remaining sheet = Area of Large Circle - Area of small circle

So,

➭ Area of remaining sheet = 16π - 9π = 7π

➭ Area of remaining sheet = 7 × 22/7 = 22 cm²