Ex – 7.3 Que No. 2 Q.2) In a Laboratory, the count of bacteria in a certain experiment was increasing at the rate of 2.5% per hour. Find the bacteria at the end of 2 hours if the count was initially 5,06,000. Solution:-
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Ex – 7.3 Que No. 1 Q.1) The population of a place increased to 54,000 in 2003 at a rate of 5% per annum Solution:-
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Ex – 9.1 Que No. 7 Q.7) The floor of a building consists of 3000 tiles which are rhombus shaped and each of its diagonals are 45 cm and 30 cm in length. Find the total cost of polishing the floor, if the cost per m2 is ₹ 4. Solution:-
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Ex – 9.1 Que No. 6 Q.6) Find the area of a rhombus whose side is 5 cm and whose altitude is 4.8 cm. If one of its diagonals is 8 cm long, find the length of the other diagonal. Solution:-
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Ex – 9.1 Que No. 5 Q.5) The diagonals of a rhombus are 7.5 cm and 12 cm. Find its area. Solution:-
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Ex – 9.1 Que No. 4 Q.4) The diagonal of a quadrilateral shaped field is 24 m and the perpendiculars dropped on it from the remaining opposite vertices are 8 m and 13 m. Find the area of the field. Solution:-
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Ex – 9.1 Que No. 3 Q.3) Length of the fence of a trapezium shaped field ABCD is 120 m. If BC = 48 m, CD = 17 m and AD = 40 m, find the area of this field. Side AB is perpendicular to the parallel sides AD and BC. Solution:-
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Ex – 9.1 Que No. 2 Q.2) The area of a trapezium is 34 cm2 and the length of one of the parallel sides is 10 cm and its height is 4 cm. Find the length of the other parallel side. Solution:-
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Ex – 9.1 Que No. 1 Q.1) The shape of the top surface of a table is a trapezium. Find its area if its parallel sides are 1 m and 1.2 m and perpendicular distance between them is 0.8 m. Solution:-
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Ex – 7.2 Que No. 5 Q.5) An article was purchased for ₹ 1239 including GST of 18%. Find the price of the article before GST was added? Solution:-
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