Advertisements
Advertisements
рдкреНрд░рд╢реНрди
A plot is in the form of rectangle ABCD having semi-circle on BC. If AB = 60m and BC = 28m, find the area of plot.
рдЙрддреНрддрд░
Given AB = 60m = DC [length]
BC = 28m = AD [breadth]
Radius of semicircle r =`1/2`× ЁЭР╡ЁЭР╢ = 14ЁЭСЪ
Area of semicircle r =`1/2`× ЁЭР╡ЁЭР╢ = 14ЁЭСЪ
Area of plot = (Area of rectangle ABCD) + (area of semicircle)
= (ЁЭСЩЁЭСТЁЭСЫЁЭСФЁЭСбтДО × ЁЭСПЁЭСЯЁЭСТЁЭСОЁЭССЁЭСбтДО) +`1/2 pir^2`
= `(60 × 28) + [1/2×22/7× 14 × 14]`
= 1680 + 308 = 1988ЁЭСЪ2
APPEARS IN
рд╕рдВрдмрдВрдзрд┐рдд рдкреНрд░рд╢реНрди
In Figure, find the area of the shaded region [Use π = 3.14]
An arc of length 15 cm subtends an angle of 45° at the centre of a circle. Find in terms of ЁЭЬЛ, radius of the circle.
Find the area of a right – angled triangle, the radius of whose, circumference measures 8 cm and the altitude drawn to the hypotenuse measures 6 cm.
A horse is placed for grazing inside a rectangular field 70 m by 52 m. It is tethered to one corner by a rope 21 m long. On how much area can it graze? How much area is left ungrazed?
The diameter of a right circular cylinder is 12 m and the slant height is 10 m. Find its curved surface area and the total surface area .
The cost of fencing a circular field at the rate of тВ╣ 240 per meter is тВ╣ 52,800. The field is to be ploughed at the rate of тВ╣ 12.50 per m2. Find the cost of pouching the field.
In the given figure, the area of the shaded portion is 770 cm2. If the circumference of the outer circle is 132 cm, find the width of the shaded portion.
The area between the circumference of two concentric circles is 2464cm2. If the inner circle has a circumference of 132cm, calculate the radius of the outer circle.
The numerical value of the area of a circle is greater than the numerical value of its circumference. Is this statement true? Why?
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.
