ICSE Board Practice

Class VI Class VII Class VIII Class IX Class X
ICSE Grade VIII - Time and Work
Question 1
1.
    • Two pipes can fill a tank in
    • 13
      min
    • and
    • 22
      min
    • respectively.
    • Both pipes are
    • opened together and after some time the first pipe is closed and the tank
    • becomes full in
    • 16
      12
      13
      min
    • from the time when both pipes are opened.
    • For how much time was first pipe open?
  • 6
    min
  • 1
    min
  • 2
    min
  • 4
    min
  • 3
    min
Question 2
2.
    • A and B can do a work in
    • 4
      11
      20
      hr
    • ,
    • B and C can do it in
    • 4
      8
      19
      hr
    • and C and A can do it in
    • 6
      6
      25
      hr
    • .
    • In how much time can
    • each of them do it seperately?
  • (
    13
    hr
    ,
    7
    hr
    ,
    13
    hr
    )
  • (
    13
    hr
    ,
    8
    hr
    ,
    12
    hr
    )
  • (
    13
    hr
    ,
    7
    hr
    ,
    12
    hr
    )
  • (
    14
    hr
    ,
    7
    hr
    ,
    12
    hr
    )
  • (
    14
    hr
    ,
    8
    hr
    ,
    12
    hr
    )
Question 3
3.
    • A can do a piece of work in
    • 13
      hr
    • and B in
    • 11
      hr
    • .
    • A does the work for
    • 4
      hr
    • before B join A to work together.
    • Again after
    • 3
      hr
    • C joins both A and B to complete the work in
    • 162
      287
      hr
    • .
    • In how much time C alone can do the work?
  • 7
    hr
  • 3
    hr
  • 6
    hr
  • 9
    hr
  • 5
    hr
Question 4
4.
    • A can do
    • 6
      10
    • of a work in
    • 4
      1
      5
      days
    • .
    • He works for
    • 3
      days
    • when B joins him.
    • They work together and complete the work in
    • 2
      3
      5
      days
    • .
    • In how much time, B alone can do the work?
  • 11
    days
  • 13
    days
  • 12
    days
  • 14
    days
  • 16
    days
Question 5
5.
    • A and B can do a work in
    • 3
      days
    • and
    • 9
      days
    • respectively.
    • They together undertook to do a piece of work for
    • ₹4800.00
    • .
    • What is the share of B?
  • ₹1199.00
  • ₹3600.00
  • ₹1201.00
  • ₹1200.00
  • ₹3598.00
Question 6
6.
    • Pipe A can fill a tank in
    • 8
      hr
    • and pipe B can empty the full tank in
    • 32
      hr
    • .
    • If both the pipes are opened together,
    • in how much time will the tank become full?
  • 10
    2
    5
    hr
  • 12
    hr
  • 10
    hr
  • 10
    2
    3
    hr
  • 11
    1
    3
    hr
Question 7
7.
    • A certain number of men can do a work in
    • 15
      days
    • .
    • If there were
    • 8
    • men
    • less
    • ,
    • it would take
    • 5
      days
    • more
    • to complete the work.
    • How many men are required to complete the work in
    • 12
      days
    • ?
  • 40
  • 42
  • 41
  • 39
  • 37
Question 8
8.
    • A can construct
    • 3
      9
    • of a wall in
    • 2
      2
      3
      days
    • .
    • B can construct
    • 3
      6
    • of the wall in
    • 4
      days
    • .
    • C can construct
    • 2
      5
    • of the wall in
    • 4
      days
    • .
    • If all three work together, in how much time will they
    • construct
    • 3
      10
    • of the wall?
  • 2
    3
    days
  • 4
    7
    days
  • 1
    1
    7
    days
  • 6
    7
    days
  • 1
    1
    5
    days
Question 9
9.
    • A sum of
    • ₹99.00
    • will be given to do a work.
    • A and B can do it in
    • 3
      1
      3
      days
    • .
    • B and C can do in
    • 6
      days
    • .
    • C and A can do in
    • 3
      3
      4
      days
    • .
    • How much A, B and C respectively will get if all three work together?
  • (
    ₹54
    ,
    ₹27
    ,
    ₹18
    )
  • (
    ₹27
    ,
    ₹18
    ,
    ₹54
    )
  • (
    ₹18
    ,
    ₹27
    ,
    ₹54
    )
  • (
    ₹18
    ,
    ₹54
    ,
    ₹27
    )
  • (
    ₹54
    ,
    ₹18
    ,
    ₹27
    )
Question 10
10.
    • P and Q can do together a piece of work in
    • 3
      1
      13
      days
    • .
    • After they have worked together for
    • 2
      days
    • ,
    • P stops.
    • Q completes the remaining work in
    • 1
      3
      4
      days
    • .
    • In how many days can Q alone do the work?
  • 5
    days
  • 4
    days
  • 8
    days
  • 6
    days
  • 3
    days