The amount of water evaporating from a pond in a day is proportional tothe surface area of the pond. 70 litres of water evaporates in a day from a pond of area 1250 m². If 42 litres of water evaporates in a day from a
pond, what will be the area of that pond?
750 m^{2}
650 m^{2}
550 m^{2}
450 m^{2}
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The cost of the marble varies directly with square of its weight.marble is broken into 3 parts whose weights are in the ratio 3:4:5. if marble had been broken into three equal parts by weight then there would have been a further loss of rs.1800.what is the actual cost of the original(or unbroken)marble?
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A solid diamond falls and breaks into three pieces whose weights are in the ratio of 2 : 3 : 4. The value of each piece is directly proportional to the square of their weights. Given that the value of solid diamond is Rs 24300, find the loss due to breakage.
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3
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The mileage obtained by a car is directly proportional to the average speed at which it is travelling and is inversely proportional to the passenger load. The car gets a mileage of 20 kmph when it is travelling at a speed of 60 kmph and the passenger load is 150 kg. What will be the mileage when the car is travelling at a speed of 70 kmph with a passenger load of 140 kg?
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