Forum

Direct & Inverse Proportions

When two quantities x and y are in ______ proportion or vary ______
they are written as x ∝ y.

Direct & Inverse Proportions

If xy = 10, then x and y vary ______ with each other

Direct & Inverse Proportions

If x = 5y, then x and y vary ______ with each other.

Direct & Inverse Proportions

Both x and y vary directly with each other and when x is 10, y is 14,
which of the following is not a possible pair of corresponding values
of x and y?
(a) 25 and 35 (b) 35 and 25 (c) 35 and 49 (d) 15 and 21

Direct & Inverse Proportions

If two quantities p and q vary inversely with each other, then
(a) p/q remains constant. (b) p + q remains constant.
(c) p × q remains constant. (d) p – q remains constant.

Direct & Inverse Proportions

If two quantities x and y vary directly with each other, then
(a) x/y remains constant. (b) x – y remains constant.
(c) x + y remains constant. (d) x × y remains constant.

Direct & Inverse Proportions

100 persons had food provision for 24 days. If 20 persons left the
place, the provision will last for
(a) 30 days (b) 96/5 days
(c) 120 days (d) 40 days

Direct & Inverse Proportions

Meenakshee cycles to her school at an average speed of 12 km/h
and takes 20 minutes to reach her school. If she wants to reach her
school in 12 minutes, her average speed should be

(a) 20/3 km/h (b) 16 km/h(c) 20 km/h (d) 15 km/h

Direct & Inverse Proportions

Both x and y are in direct proportion, then x/1 and y/1 are
(a) in indirect proportion.
(b) in inverse proportion.
(c) neither in direct nor in inverse proportion.
(d) sometimes in direct and sometimes in inverse proportion.

Direct & Inverse Proportions

Which of the following vary inversely with each other?
(a) speed and distance covered.
(b) distance covered and taxi fare.
(c) distance travelled and time taken.
(d) speed and time taken.