Use Of Statistical Tools - Class 11 Commerce Economics - Extra Questions

A cyclist travels from a place $$A$$ to a place $$B$$ along the same route at a uniform speed on different days. The following table gives the speed of his travel and the corresponding time he took to cover the distance.

Speed in $$km/hr$$ $$x$$	$$2$$	$$4$$	$$6$$	$$10$$	$$12$$
Time in hrs $$y$$	$$60$$	$$30$$	$$20$$	$$12$$	$$10$$

Draw the speed-time graph and use it to find
(i) the number of hours he will take if he travels at a speed of $$5km/hr$$
(ii) the speed with which he should travel if he has to cover the distance in $$40$$ hrs.

From the table, we observe that as $$x$$ increases, $$y$$ decreases.
This type of variation is called indirect variation,
Here, $$xy=120$$
Thus, $$y=\cfrac{120}{x}$$
Plot the points $$(2,60),(4,30),(6,20),(10,12)$$ and $$(12,10)$$
Join these points by a smooth curve.
From the graph, we have
(i) The number of hours he needed to travel at a speed of $$5km/hr$$ is $$24$$ hrs.
(ii) The required speed to cover the distance in $$40$$ hrs is $$3km/hr$$

Why is fusion of an organic compounds with sodium required?

Class 11 Commerce Economics Extra Questions

• Collection Of Data Extra Questions
• Correlation Extra Questions
• Index Numbers Extra Questions
• Introduction To Economics Extra Questions
• Introduction To Microeconomics Extra Questions
• Market Equilibrium Extra Questions
• Measures Of Central Tendency Extra Questions
• Measures Of Dispersion Extra Questions
• Non-Competitive Markets Extra Questions
• Organisation Of Data Extra Questions
• Presentation Of Data Extra Questions
• Production And Costs Extra Questions
• Theory Of Consumer Behaviour Extra Questions
• The Theory Of The Firm Under Perfect Competition Extra Questions
• Use Of Statistical Tools Extra Questions