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71.The L.C.M of two numbers is 48. The numbers are in the ratio 2:3. The sum of numbers is____?
72.The L.C.M. of two numbers is 48. The numbers are in the ratio 2 : 3. Then sum of the number is____?
73.The length and breadth of a rectangle are in the ratio 5:4. Find its perimeter if its area is 180 cm²
74.The length and breadth of a rectangular piece of land are in the ratio of 5:3. The owner spent Rs 3000 for surroundings it from are the sides at Rs 7.50 per meter. The difference between is length and breadth is____?
75.The monthly incomes of A and B are in the ratio 5 : 2. B’s monthly income is 12% more than C’s monthly income. If C’s monthly income is Rs. 15000, then find the annual income of A?
76.The number of seats available for Biology and Computer Science in a school is in the ratio 5:8. They are to be increased by 30% and 25% . Find the new ratio.
77.The perimeter of a triangle is 81 cm. If the sides are in the ratio 4:3:2, find the length of the largest side.
78.The population of a town increases 4 % annually but is decreased by emigration annually to the extent of (1/2) %. What will be the increase percent in three years?
79.The radius of the two circular fields is in the ratio 3: 5 the area of the first field is what percent less than the area of the second?
80.The ratio between the length and breadth of a rectangular field is 5:4. If the breadth is 20 meters less than the length. The perimeter of the field is____?