Advertisements
Advertisements
Question
Ishika has designed a small oval race track for her remote control car. Her design is shown in the given figure. What is the total distance around the track? Round your answer to the nearest whole centimetre.
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
A bicycle whell makes 5000 revolutions in moving 11 km. Find the diameter of the wheel
A pendulum swings through an angle of 30º and describes an arc 8.8 cm in length. Find the length of the pendulum.
An arc of length 15 cm subtends an angle of 45° at the centre of a circle. Find in terms of 𝜋, radius of the circle.
The minute hand of a clock is √21 𝑐𝑚 long. Find area described by the minute hand on the face of clock between 7 am and 7:05 am
The circumferences of two circles are in the ratio 2: 3. What is the ratio between their areas?
If the perimeter of a square is equal to the circumference of a circle then the ratio of their areas 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.
The circumference of a circle is equal to the perimeter of a square. The area of the square is 484 sq. m. Find the area of the circle.
The wheel of a bullock cart has a diameter of 1.4 m. How many rotations will the wheel complete as the cart travels 1.1 km?
The perimeter of circular and square fields is equal. If the area of the square field is 484 m2 then the diameter of the circular field is ____________.
