WORD PROBLEMS ON QUADRATIC EQUATIONS WORKSHEET

(1)  If the difference between a number and its reciprocal is 24/5, find the number.            Solution 

(2)  A garden measuring 12m by 16m is to have a pedestrian pathway that is ‘w’ meters wide installed all the way around so that it increases the total area to 285 m². What is the width of the pathway?         Solution 

(3)  A bus covers a distance of 90 km at a uniform speed. Had the speed been 15 km/hour more it would have taken 30 minutes less for the journey. Find the original speed of the bus.         Solution 

(4)  A girl is twice as old as her sister. Five years hence, the product of their ages (in years) will be 375. Find their present ages.       Solution

(5)  A pole has to be erected at a point on the boundary of a circular ground of diameter 20 m in such a way that the difference of its distances from two diametrically opposite fixed gates P and Q on the boundary is 4 m. Is it possible to do so? If answer is yes at what distance from the two gates should the pole be erected?     Solution

(6)  From a group of 2x² black bees , square root of half of the group went to a tree. Again eight-ninth of the bees went to the same tree. The remaining two got caught up in a fragrant lotus. How many bees were there in total?   

Solution

(7)  Music is been played in two opposite galleries with certain group of people. In the first gallery a group of 4 singers were singing and in the second gallery 9 singers were singing. The two galleries are separated by the distance of 70 m. Where should a person stand for hearing the same intensity of the singers voice? (Hint: The ratio of the sound intensity is equal to the square of the ratio of their corresponding distances).         Solution

(8)  There is a square field whose side is 10 m. A square flower bed is prepared in its centre leaving a gravel path all round the flower bed. The total cost of laying the flower bed and gravelling the path at ₹3 and ₹4 per square metre respectively is ₹364. Find the width of the gravel path.       Solution

(9)  Two women together took 100 eggs to a market, one had more than the other. Both sold them for the same sum of money. The first then said to the second: “If I had your eggs, I would have earned ₹15”, to which the second replied: “If I had your eggs, I would have earned ₹ 6 ⅔”. How many eggs did each had in the beginning?

Solution

(10)  The hypotenuse of a right angled triangle is 25 cm and its perimeter 56 cm. Find the length of the smallest side.                Solution

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