Quiz Discussion

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?

• 1]

  25 kmph

• 2]

  26 kmph

• 3]

  27 kmph

• 4]

  28 kmph

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?​

• 1]

  750 m²

• 2]

  650 m²

• 3]

  550 m²

• 4]

  450 m²

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?

• 1]

  129600 Rs

• 2]

  133000Rs

• 3]

  129430 Rs

• 4]

  390000 Rs