Area Problems A rectangular lawn 55m by 35m has two roads each 4m wide running in the middle of it. One parallel to the length and the other parallel to breadth. The cost of graveling the roads at 75 paise per sq meter is rs.158 rs.258 rs.358 rs.58 rs.158 rs.258 rs.358 rs.58 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP area of cross roads = (55 x 4) + (35 x 4)- (4 x 4) = 344sq m cost of graveling = 344 x (75/100) = Rs. 258
Area Problems In a rhombus, whose area is 144 sq.cmone of its diagonal is twice as long as the other, The lengths of its diagonals are? 12 cm, 24 cm 6 ?2 cm, 12?2 cm 24 cm, 48 cm 6 cm, 12 cm 12 cm, 24 cm 6 ?2 cm, 12?2 cm 24 cm, 48 cm 6 cm, 12 cm ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Area of rhombus = (d1 x d2) / 2? (d x 2d ) / 2 = 144? d2 = 144? d = 12 ? Length of diagonal = 12 cm, 24 cm
Area Problems The circumferences of two concentric are 176 m and 132 m respectively. what is the difference between their radii? 8 meter 44 meter 7 meter 5 meter 8 meter 44 meter 7 meter 5 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 If the sides of a rectangle are increased by 5%, find the percentage increase in its diagonals. 4% 6% 9% 5% 4% 6% 9% 5% ANSWER EXPLANATION DOWNLOAD EXAMIANS APP According to the formula,Percentage increase in diagonals = 5%
Area Problems Three circles of radius 3.5cm are placed in such a way that each circle touches the other two. The area of the portion enclosed by the circles is 1.867 1.767 1.967 1.567 1.867 1.767 1.967 1.567 ANSWER DOWNLOAD EXAMIANS APP
Area Problems The area of circle is 38.5 sq. cm. Its circumference is? 121 cm 11 cm 6.20 cm 22 cm 121 cm 11 cm 6.20 cm 22 cm ANSWER EXPLANATION DOWNLOAD EXAMIANS APP ? ( 22 x r2) / 7 = 38.5? r2 =(38.5 x 7) /22? r = 3.5 cm? Circumference = 2 x (22/7) x 3.5 cm= 22 cm
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