Question

In which of the following inverse variation is represented?

I. If one person can make a wall in 36 days, then 3 person will make the same wall in (36/3) i.e 12 days.
II. If a car moving at the speed of y km/hr covers a distance of ‘z’ km in time ‘t’, then it
will cover ‘2z’ km distance in time ‘t’ by moving at the speed of 2y km/hr

1. OnlyII
2. Only I
3. Both I and II
4. Neither I nor II

Answer 1

Correct Answer - Option 2 : Only I

To under the concept of proportionality, the concept of direct and indirect variations is used.

• Direct Variations: If two values are interdependent and one value increases as we increase the other value, or one value decreases as the other value decreases, it is called direct variations. For example, as mass increased, force also increases.
• Inverse variation: If two values are interdependent and one value decreases as we increase the other value, or, one value increases as the other value decreases, it is called direct variations. For example, more people will take less time to complete a piece of work.