ICSE Understanding Mathematics Class 8>Chapter 9 - Direct and Inverse Variation>Exercise>Q 1

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IMPORTANT

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A farmer can reap a field in $10$ days while his wife can do it in $8$ days. If they work together, in how much time can they reap the field?

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Important Questions on Direct and Inverse Variation

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8th ICSE

IMPORTANT

ICSE Understanding Mathematics Class 8>Chapter 9 - Direct and Inverse Variation>Exercise>Q 6

A

and

B

separately do a work in

10

and

15

days respectively. They worked together for some days and then

A

completed the remaining work in

5

days. If

A

and

B

worked together for

k

days, find the value of

k

.

HARD

8th ICSE

IMPORTANT

ICSE Understanding Mathematics Class 8>Chapter 9 - Direct and Inverse Variation>Exercise>Q 8

A

can do a job in

10

days while

B

can do it in

15

days. If they work together and earn

₹ 3500,

how should they share the money?

HARD

8th ICSE

IMPORTANT

ICSE Understanding Mathematics Class 8>Chapter 9 - Direct and Inverse Variation>Exercise>Q 9

A, B

and

C

can separately do a work in

2, 6

and

3

days respectively. Working together, how much time would they require to do it? If the work earns them

₹ 960

, how should they divide the money?

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IMPORTANT

ICSE Understanding Mathematics Class 8>Chapter 9 - Direct and Inverse Variation>Exercise>Q 10

A, B

and

C

together can do a piece of work in

15

days,

B

alone can do it in

30

days and

C

alone can do it in

40

days. In how many days will

A

alone do the work?

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IMPORTANT

ICSE Understanding Mathematics Class 8>Chapter 9 - Direct and Inverse Variation>Exercise>Q 11

A, B

and

C

working together can plough a field in

4 \frac{4}{5}

days

. A

and

C

together can do it in

8

days. If

B

takes

k

days when working alone take to plough the field?

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IMPORTANT

ICSE Understanding Mathematics Class 8>Chapter 9 - Direct and Inverse Variation>Exercise>Q 12

A

and

B

together can build a wall in

10

days;

B

and

C

working together can do it

15

days;

C

and

A

together can do it in

12

days. How long will they take to finish the work, working all together? Also find the number of days taken by each to do the same work, working alone.

EASY

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IMPORTANT

ICSE Understanding Mathematics Class 8>Chapter 9 - Direct and Inverse Variation>Objective Type Questions>Q 1

The time taken to finish a work varies _____ to the number of men at work. (directly/inversely)

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IMPORTANT

ICSE Understanding Mathematics Class 8>Chapter 9 - Direct and Inverse Variation>Objective Type Questions>Q 1

The speed of a moving object varies inversely to the _____ to cover a certain distance.