What is the area of a tringle whose sides are 7cm and 9cm ? 18 √2 42 √6 12 √2 5 √3 12 √5 Option E S = 7 + 8 + 9/2 = 24/2 = 12Area of tringle = √ S(S – a) (S – b) (S – c) = √ 12 * 5 * 4 * 3 =…
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If the length of a rectangular field is increased by 15% and breadth is also increased by 10%, the area of the rectangle will be 253 m^2. What is the area of the original area of rectangle ? 400 240 350 180 200 Option E let original area of rectangle =100percentage change in area=15+10+15*10/100=26.5126.5=253original area=253/126.5*100=200 m^2 The side of…
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The ratio of length and breadth of rectangular field is 3 : 2. If the perimeter of rectangular field is 40cm, then what is the area of square whose side 5cm more than the length of rectangular field ? 216 289 324 196 400 Option B Let length and breadth or rectangular field = 3x and 2x perimeter = 402(3x…
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The perimeter of an equilateral triangle is equal to the perimeter of a square whose diagonal is 9√2 cm. Find out the area of the equilateral triangle ? 48√3 60√3 30√3 36√3 20√3 Option D side of square=9√2/√2=9let the side of equilateral triangle be x cm.3x=4*9 x=12 area of equilateral triangle= √3/4*12*12=36√3 If ratio of height and radius of…
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Four goats are tehtered at 4 corners of a square field of side 60 metres so that they just cannot reach one another.Find the area left ungrazed by the goats? 650 m 680 m 771 m 750 m None of these Option C Lenght=60/2=30 mTotal area =22*30*30/7Ungrazed area=Area of square field – area covreed by 4 goats =3600 – 2829…
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The area of rectangular field is 3375 m^2 and length and breadth are in ratio 5:3.Find the length? 75 m 125 m 50 m 45 m None of these Option A 5x * 3x = 337515x^2 =3375x = 15Length=5 * 15 = 75 The perimeter of a square is twice the perimeter of rectangle.If the perimeter of square is…
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A room of dimensions 12*8*6 in meters has one door of dimensions 0.5*0.4 in meters and one more window of dimensions 1*0.5 in meter. Find the cost of applying paint on the four walls along with the ceiling of the room but excluding the door and windows at Rs. 40/m^2. Rs. 13298 Rs. 11267 Rs. 14259 Rs. 13284 Rs. 15250…
Read MoreThe side of the square exceeds the side of another square by 6cm and the sum of the areas of the two squares is 260cm2. The dimensions of the squares is 6cm and 12cm 8cm and 14 cm 10cm and 16cm 5cm and 11cm None Option B Solution: Let the side of the square=x cm Side of another square =…
Read MoreThe ratio between the perimeter and the breadth of a rectangle is 26 : 5. If the area of the rectangle is 1000 sq. cm, what is the length of the rectangle? 45cm 35cm 40cm 30cm None Option C Solution: 2(l+b):b=26:5 10l+10b=26b 10l=16b b=5/8l Area lb=1000 l*5/8l=1000 l2=1600 l=40cm. A cistern 6m long and 4 m wide contains water up…
Read MoreThe cost of fencing around a circular field is Rs 8580 at the rate of Rs 15 per foot . What is the area of the circular field ? 23450 26026 22351 21485 None Option B Solution: Fencing = 8580/15=572= Circumference of a circle field 2Ï€r = 572 2*22/7*r = 572 r=91 Area = 22/7 *91 * 91 = 26026…
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