Advertisements
Advertisements
प्रश्न
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
उत्तर
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
संबंधित प्रश्न
Four equal circles each of radius a, touch each other. Show that area between them is `6/7a^2`
In the given figure, O is the centre of the sector. \[\angle\]ROQ = \[\angle\]MON = 60° . OR = 7 cm, and OM = 21 cm. Find the lengths of arc RXQ and arc MYN. (\[\pi = \frac{22}{7}\])
A square ABCD is inscribed in a circle of radius r. Find the area of the square.
A wire when bent in the form of an equilateral triangle encloses an area of `121sqrt(3) "cm"^2`. The same wire is bent to form a circle. Find the area enclosed by the circle.
PQRS is a diameter of a circle of radius 6 cm. The lengths PQ, QR and RS are equal. Semicircles are drawn with PQ and QS as diameters, as shown in the given figure. If PS = 12 cm, find the perimeter and area of the shaded region.
The area of a circle is 38.5 cm2. The circumference of the circle is
A bucket is raised from a well by means of a rope wound round a wheel of diameter 35 cm. If the bucket ascends in 2 minutes with a uniform speed of 1.1 m per sec, calculate the number of complete revolutions the wheel makes in raising the bucket.
Sum of the areas of two squares is 157 m2. If the sum of their perimeters is 68 m, find the sides of the two squares.
The radius of two circles are 20 cm and 13 cm. Find the difference between their circumferences. (Take π =`22/7`)
Find the circumference of the circle whose area is 25times the area of the circle with radius 7cm.
