form a circular sheet of radius 21 cm five circles of radius 3.5 cm, a rectangle of length 4 cm and 3 cm, and a square of side 1 cm are removed. find the area of the remaining sheet .
Answers
Step-by-step explanation:
firstly find the area of whole circle
then subtract the sum of areas of 5 small circles and area of rectangle and area of square
therefore you will get the area remained
thank you
Answer:
1180.5 cm2 is the area of remaining sheet.
Step-by-step explanation:
Step-by-step explanation:
Area of circular sheet = πr2
= 22/7 x 21 x 21
= 1386 cm2
Area of circles = radius = 3.5 cm
=5 x πr2
= 5 x 22/7 x 3.5 x 3.5
= 192.5 cm2
Area of rectangle = l x b = 4 x 3 = 12 cm2
Area of square = side x side = 1 x 1 = 1 cm2
Area of remaining sheet =Area of circular sheet - (area of 5 circles + area of rectangle + area of square)
= 1386 - ( 192.5 + 12 + 1 ) = 1386 - 205.5 = 1180.5 cm2
Ans = 1180.5 cm2 is the area of remaining sheet.