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CBSE Notes 2011-2012 » Direct and Inverse Proportions - Class 8 Maths MCQs (Free Practice Test)

Direct and Inverse Proportions - Class 8 Maths MCQs (Free Practice Test)


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Question :

A train 150 m long, is running at a speed of 90 km/hr. Then time taken by the train to cross a tree is


Answer :

3 sec
4 sec
5 sec
6 sec


Question :

If two quantities x and y are related to each other in such a way that x/y remains a positive constant, then x and y are said to be in


Answer :

inverse variation
direct variation
variation
none of these


Question :

A train is running at a speed of 90 km/hr, crosses a pole in 10 seconds. The length of the train is


Answer :

200m
250m
300m
320m


Question :

x and y are in inverse proportion. If y = 15 when x = 3, then the value ofy when x = 9, is


Answer :

45
5
8
9


Question :

If ten pipes through which water flows at the same rate can fill a tank in 28 minutes. If three pipes go out of order, how long will the remaining pipes take to fill the tank ?


Answer :

40 minutes
40 minutes
56 minutes
42 minutes


Question :

If 18 binders bind 900 books in 10 days, then how many binders will be required to bind 660 books in 12 days ?


Answer :

12
11
9
14


Question :

The cost price of articles and number of articles are said to be in


Answer :

direct variation
inverse variation
variation
none of these


Question :

If two quantities x and y are related to each other in such a way that xy is a constant, then x and y are said to be in


Answer :

inverse variation
direct variation
variation
none of these


Question :

If a train 120 m long crosses a man in 15 seconds. Then the speed of the train is


Answer :

6 m/s
7 m/s
8 m/s
9 m/s


Question :

x and y are in direct variation. I f y = 10 when x - 5, then value of y when x = 10, is


Answer :

2
5
10
20