Advertisements
Advertisements
Question
Ishika has designed a small oval race track for her remote control car. Her design is shown in the figure. What is the total distance around the track? Round your answer to the nearest whole cm.
Advertisements
Solution
Total distance around the track = Length of 2 parallel strips + Length of 2 semi-circles
= 2 × 52 + 2 × π × 16 ...[∵ r = 16 cm]
= 104 + 2 × 3.14 × 16
= 104 + 100.5009
= 205 cm (approx)
APPEARS IN
RELATED QUESTIONS
In circle of radius 6cm, chord of length 10 cm makes an angle of 110° at the centre of circle find The area of sector
Find the circumferences of a circle whose radius is 7 cm.
The areas of two circles are in the ratio 9 : 4. The ratio of their circumferences is ______.
A 7 m road surrounds a circular garden whose area is 5544 m2. Find the area of the road and the cost of tarring it at the rate of Rs.150 per sq m.
Find the area and perimeter of the following sector :
Radius= 6 cm, angle at the centre is 70°
A horse is tied with a 21 m laig rope to the corner of a field which is in the shape of an equilateral triangle. Find the area of the field over which it can graze.
Find the circumference of the circle whose area is 81π cm 2.
Find the volume and the surface area of the spheres in the following :
Diameter= 6.3 cm
Each side of a square is 44 cm. Find its perimeter. If this perimeter is equal to the circumference of a circle, find the radius of the circle.
A 4.2m wide road surrounds a circular plot whose circumference is 176m. Find the cost of paving the road at Rs.75per m2.
