CBSE Class 10-Mathematics: Chapter – 12 Areas Related to Circles Part 4 (For CBSE, ICSE, IAS, NET, NRA 2022)
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Question 2:
Figure depicts an archery target marked with its five scoring areas from the center outwards as Gold, Red, Blue, Black, and White. The diameter of the region representing Gold score is and each of the other bands is wide. Find the area of the five scoring regions.
Answer:
Gold: Diameter
Area of gold scoring region
Red: Area of red scoring region
Blue: Area of blue scoring region
Black: Area of black scoring region
White: Area of white scoring region =
Question 3:
The wheels of a car are of diameter each. How many complete revolutions does each wheel make in minutes when the car is travelling at a speed of per hour?
Answer:
Diameter of wheel
Radius of wheel
Distance covered by wheel in one revolution
Distance covered by wheel in 1 hour
Distance covered by wheel in 10 minutes
No. of revolutions
Question 4:
Tick the correct answer in the following and justify your choice: If the perimeter and area of a circle are numerically equal, then the radius of the circle is:
(A)
(B)
(C)
(D)
Answer:
(A)
Circumference = Area
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