Advertisements
Advertisements
प्रश्न
A wheel has a diameter of 84 cm. Find how many completer revolutions must it make to cover 3.168 km.
Advertisements
उत्तर
The diameter of the wheel = 84 cm
Thus, the radius of the wheel = 42 cm
Circumference of the wheel = 2 x `22/7` x 42 = 264 cm
In 264 cm, the wheel is covering one revolution.
Thus, in 3.168 km = 3.168 x 100000 cm, number of revolutions
covered by the wheel = `3.168/264 xx 100000` = 1200.
APPEARS IN
संबंधित प्रश्न
In the given figure, the side of square is 28 cm and radius of each circle is half of the length of the side of the square where O and O' are centres of the circles. Find the area of shaded region.
The side of a square is 10 cm. find the area of circumscribed and inscribed circles.
A car travels 1 km distance in which each wheel makes 450 complete revolutions. Find the radius of wheel.
In circle of radius 6cm, chord of length 10 cm makes an angle of 110° at the centre of circle find Length of arc
Find the curved surface area , the total surface area and the volume of a cone if its :
Height = 8 cm , diameter = 12 cm
A hollow metallic cylindrical tube has an internal radius of 3.5 cm and height 21 cm. The thickness of the metal tube is 0.5 cm. The tube is melted and cast into a right circular cone of height 7 cm. Find the radius of the cone, correct to one decimal place.
The base circumferences of two cones are the same. If their slant heights are in the ratio 5 : 4, find the ratio of their curved surface areas.
Construct the circumcircle of the ABC when BC = 6 cm, B = 55° and C = 70°.
The diameter of the bullock cart wheel is 1.4 m. Find the distance covered by it in 150 rotations?
A Rose garden is in the form of circle of radius 63 m. The gardener wants to fence it at the rate of ₹ 150 per metre. Find the cost of fencing?
