Area Problems If the sides of a rectangle are increased by 10% find the percentage increased in its diagonals. 10% 20% 18% 15% 10% 20% 18% 15% ANSWER EXPLANATION DOWNLOAD EXAMIANS APP According to the formula,? Percentage increase in sides = 10%? Percentage increase diagonals = 10%
Area Problems The ratio of the area of square of side a and equilateral triangle of side a is? 2 : ?3 4 :3 4 : ?3 2 :1 2 : ?3 4 :3 4 : ?3 2 :1 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Ratio of area = a2/ ?(3/4) a2= 4/?3 = 4:?3
Area Problems The area of the sector of a circle, whose radius is 12 meters and whose angle at the centre is 42, is? 26.4 sq. meters 52.8 sq. meters 39.6 sq. meters 79.2 sq. meters 26.4 sq. meters 52.8 sq. meters 39.6 sq. meters 79.2 sq. meters ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Area of the sector = [(22/7) x 12 x 12] x [42°/360°] m2 = 52.8 m2
Area Problems The circumferences of two concentric are 176 m and 132 m respectively. what is the difference between their radii? 7 meter 8 meter 5 meter 44 meter 7 meter 8 meter 5 meter 44 meter ANSWER EXPLANATION DOWNLOAD EXAMIANS APP ? 2?R - 2?r = (176-132)? 2?(R-r) = 44? R-r = ( 44 x 7 )/ (2 x 22)= 7 m
Area Problems The question given below contain two statements giving certain data. You have to decide whether the data given in the statements are sufficient for answering the question ? Question : What is the height of a right-angled triangle ? Statements : A. The area of the triangle is 20 times its base. B. The perimeter of the triangle is equal to that of a square of the side 10 cm. Both A & B are required Neither (A) nor (B) is reuired Only statement A is required Only statement B is required Both A & B are required Neither (A) nor (B) is reuired Only statement A is required Only statement B is required ANSWER EXPLANATION DOWNLOAD EXAMIANS APP From statement (A), 20b = (1/2) × b × h h = 40 cm.
Area Problems The Area of a square is 50 sq. units. Then the area of the circle drawn on its diagonal is? None of theas 50? sq. units 100? sq. units 25? sq. units None of theas 50? sq. units 100? sq. units 25? sq. units ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Area = (Diagonal)2 / 2 = 50? Diagonal = 10 units ? Radius of required circle = 5 unitsIts area = [? x (5)2 ] cm2= 25? units2
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