Question

the length of a minute hand is 2.1 find the area swept by it in one and half an hour​

Answer 1

Answer:

let's visualize minute hand as a radius of circle

area of circle = πrsqaure

area = π × 2.1 × 2.1

area = 13.8544236

since it's one and a half hour therefore it means area of a complete circle and a half circle .

so, our answer will be 13.8544236 + 13.8544236/2

=13.8544236+ 6.9272118 =20.1265416

answer therefore of 1 and a half an hour of circle with radius 2.1 = 20.1265416

hope it helps kindly mark it brainliest

Answer 2

Answer:

20.76 cm(square)

Step-by-step explanation:

circles it took=1+0.5

                      =1.5

length of the radius = 2.1 cm

area of circle = πr square

                       =3.14*2.1*2.1

                        =13.84 cm(square)

total area=1.5*13.84

               =20.76cm(square)