Secondary School (English Medium) (5 to 8) इयत्ता ८ - CBSE Question Bank Solutions

If 12 pumps can empty a reservoir in 20 hours, then time required by 45 such pumps to empty the same reservoir is ______ hours.

If x varies inversely as y, then 

If on increasing a, b decreases in such a manner that ______ remains ______ and positive, then a and b are said to vary inversely with each other.

If two quantities p and q vary inversely with each other then ______ of their corresponding values remains constant.

If x varies inversely as y and x = 4 when y = 6, then when x = 3 the value of y is ______.

In case of inverse proportion, `a_2/- = b_2/-`

When the speed is kept fixed, time and distance vary inversely with each other.

Length of a side of an equilateral triangle and its perimeter vary inversely with each other.

If d varies directly as t², then we can write dt² = k, where k is some constant.

If a tree 24 m high casts a shadow of 15 m, then the height of a pole that casts a shadow of 6 m under similar conditions is 9.6 m.

If x and y are in inverse proportion, then (x + 1) and (y + 1) are also in inverse proportion.

If p and q are in inverse variation then (p + 2) and (q – 2) are also in inverse proportion.

If one angle of a triangle is kept fixed then the measure of the remaining two angles vary inversely with each other.

When two quantities are related in such a manner that if one increases and the other decreases, then they always vary inversely.

If x varies inversely as y and when x = 6, y = 8, then for x = 8 the value of y is 10.

Write whether the following statement vary directly, vary inversely with each other, or neither of the two.

The time taken by a train to cover a fixed distance and the speed of the train.

Write whether the following statement vary directly, vary inversely with each other, or neither of the two.

The number of people working and the time to complete a given work.

Write whether the following statement vary directly, vary inversely with each other, or neither of the two.

Compound interest on a given sum and the sum invested.

Write whether the following statement vary directly, vary inversely with each other, or neither of the two.

The height of a tree and the number of years.

Write whether the following statement vary directly, vary inversely with each other, or neither of the two.

Increase in cost and number of shirts that can be purchased if the budget remains the same.