Advertisements
Advertisements
рдкреНрд░рд╢реНрди
A playground has the shape of rectangle, with two semicircles on its smaller sides as diameters, added to its outside. If the sides of rectangle are 36m and 24.5m. find the area of playground.
рдЙрддреНрддрд░
Let rectangular play area be ABCD
AB = CD = 36m [length]
AD = BC = 24.5 m [breadth]
Radius of the semicircle =`1/2`(ЁЭР╡ЁЭР╢) = ЁЭСЕ
=`1/2`× (24.5) = 12.25ЁЭСРЁЭСЪ
Area of playground = (Area of rectangle) + 2(Area of semicircle)
= (ЁЭР┤ЁЭР╡ × ЁЭР╡ЁЭР╢) +` (1/2pir^2) 2`
= (36 × 24.5) +` (1/2×22/7× 12.25 × 12.25) 2`
= 882 + 471.625
= 1353.625 ЁЭСЪ2
APPEARS IN
рд╕рдВрдмрдВрдзрд┐рдд рдкреНрд░рд╢реНтАНрди
A steel wire when bent is the form of square encloses an area of 12 cm2. If the same wire is bent in form of circle. Find the area of circle.
The hypotenuse of a right-angled triangle is 65 cm and its base is 60 cm. Find the length of perpendicular and the area of the triangle.
Find the radius of a circle whose perimeter and area are numerically equal.
The speed of the car is 66 km/hour. If each wheel of the car is 140 cm in diameter, find the number of revolutions made by each wheel per minute.
Find the volume and the surface area of the spheres in the following :
Diameter= 6.3 cm
The diameter of the wheel of a cart is 1.05 m. How much distance will the cart cover in 1000 rotations of the wheel?
The radius of the wheel of a bus is 0.7 m. How many rotations will a wheel complete while traveling a distance of 22 km?
Diameters of different circles are given below. Find their circumference (Take π = `22/7`)
d = 70 cm
Circumference of a circle is always ______.
