Advertisements
Advertisements
рдкреНрд░рд╢реНрди
A car travels 1 km distance in which each wheel makes 450 complete revolutions. Find the radius of wheel.
рдЙрддреНрддрд░
Let radius of wheel = ‘r’ m
Circumference of wheel = (2ЁЭЬЛr)m.
No. of revolutions = 450
Distance for 450 revolutions = 450 × 2ЁЭЬЛЁЭСЯ = 900ЁЭЬЛЁЭСЯ ЁЭСЪ
distance travelled = 1000 m.
900ЁЭЬЛr = 1000
r = 10000 9ЁЭЬЛ × 100
`=10/(9pi)` ЁЭСЪ
=`1000/(9pi)` ЁЭСРЁЭСЪЁЭСа
ЁЭСЯЁЭСОЁЭССЁЭСЦЁЭСвЁЭСа (ЁЭСЯ) =`1000/(9pi)`ЁЭСРЁЭСЪЁЭСа
APPEARS IN
рд╕рдВрдмрдВрдзрд┐рдд рдкреНрд░рд╢реНрди
The sum of the radii of two circles is 140 cm and the difference of their circumferences in 88 cm. Find the diameters of the circles.
Find the circumferences of a circle whose radius is 7 cm.
The difference between the circumference and radius of a circle is 37cm. Using `pi = 22/7` , find the circumference of the circle.
Find the area of a quadrant of a circle whose circumference is 88 cm.
The side of a square is 10 cm. Find the area of the circumscribed circle. [π = 3.14]
The diameters of the front and rear wheels of a tractor are 80 cm and 2 m respectively. Find the number of revolutions that a rear wheel makes to cover the distance which the front wheel covers is 800 revolutions.
Find the volume and the surface area of the spheres in the following :
Diameter= 6.3 cm
Complete the table below.
| Radius (r) | Diameter (d) | Circumference (c) |
| ...... | 28 cm | ...... |
The diameters of front and rear wheels of a tractor are 80 cm and 2 m respectively. Find the number of revolutions that rear wheel will make in covering a distance in which the front wheel makes 1400 revolutions.
Area of circular garden with diameter 8 m is ______.
