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Direct & Inverse Proportions

If x and y are inversely proportional then _____ = k where k is positive constant.

Direct & Inverse Proportions

Amrita takes 18 hours to travel 720 kilometres. Time taken by her to travel 360 kilometres is _______.

Direct & Inverse Proportions

Which of the following is in direct proportion?
(a) One side of a cuboid and its volume.
(b) Speed of a vehicle and the distance travelled in a
fixed time interval.
(c) Change in weight and height among individuals.
(d) Number of pipes to fill a tank and the time required
to fill the same tank.

Direct & Inverse Proportions

A car covers a distance in 40 minutes with an average
speed of 60 km per hour. The average speed to cover the
same distance in 30 minutes is

(a) 80 km/h (b) 45/2 km/h (c) 70 km/h (d) 45 km/

Direct & Inverse Proportions

If x and y are directly proportional and when x = 13,
y = 39, which of the following is not a possible pair of
corresponding values of x and y ?
(a) 1 and 3 (b) 17 and 51
(c) 30 and 10 (d) 6 and 18

Comparing Quantities

The per cent of pure gold in 14 carat gold is about 58.3%. A 14 carat
gold ring weighs 7.6 grams. How many grams of pure gold are in the
ring?

Comparing Quantities

he human body is made up mostly of water. In fact, about 67% of a
person’s total body weight is water. If Jyoti weights 56 kg, how much
of her weight is water?

Comparing Quantities

Rain forests are home to 90,000 of the 2,50,000 identified plant
species in the world. What per cent of the world’s identified plant
species are found in rain forests?

Comparing Quantities

During school hours, Neha finished 73% of her homework and
Minakshi completed 5/8 of her homework. Who must finish a greater
per cent of homework?

Comparing Quantities

A real estate agent receives Rs 50,000 as commission, which is 4%
of the selling price. At what price does the agent sell the property?