Time and Work Class-8 RS Aggarwal ICSE Maths Solutions Goyal

Time and Work Class-8 RS Aggarwal ICSE Maths Solutions Goyal Brothers Prakashan Chapter-11. We provide step by step Solutions of Exercise / lesson-11 Time and Work for ICSE Class-8  RS  Aggarwal Mathematics.

Our Solutions contain all type Questions of Exe-11 A, Exe-11 B, with Notes to develop skill and confidence.  Visit official Website  CISCE  for detail information about ICSE Board Class-8 Mathematics.

Board ICSE
Publications Goyal brothers Prakshan
Subject Maths
Class 8th
Chapter-11 Time and Work
Writer RS Aggrawal
Book Name Foundation
Topics Solution of Exe-11.a, 11.b
Academic Session 2021-2022

Time and Work Class-8 RS Aggarwal ICSE Maths Solutions Goyal Brothers Prakashan Chapter-11


–: Select Topics :–

Notes 

Exe-11 A,

 Exe-11 B,


Notes on Time and Work 

If a person can complete a work in n  days, then in 1 day he does 1/ n^{th} of the work. We have

If a person completes of a work in 1  day, then he requires n  number of days to complete the work

 If part of the work has been done and the remaining part of the work has to be done by a person A, then

No. \ of\ days \ to\ complete\ the\ work=  \frac{Remaining\ Part\ of\ the\ Work}{A's\ 1\ Day\ Work}

If A\ is\ m  times as good ·a workman as B , then

i) Ratio of work done by A \ and\  B  in the same time = m : 1

ii) Ratio of time taken by A \ and\  B  to finish the work =1: m

If some persons work together to do a piece of work, then the money paid to them is divided among them in the ratio of their one day’s (or one hour’s) work.

(i) Suppose A can finish a piece of work in 8 days.

Then, work done by A in 1 day = ¹/₈ [by unitary method].

(ii) Suppose that the work done by A in 1 day is ¹/₆

Then, time taken by A to finish the whole work = 6 days.

General Rules

(i) Suppose if a person A can finish a work in n days.

Then, work done by A in 1 day = 1/nᵗʰ part of the work.

(ii) Suppose that the work done by A in 1 day is 1n1n

Then, time taken by A to finish the whole work = n days.

(ii)If A\ is\ m  times as good ·a workman as B , then

i) Ratio of work done by A \ and\  B  in the same time = m : 1

ii) Ratio of time taken by A \ and\  B  to finish the work =1: m

5) If some persons work together to do a piece of work, then the money paid to them is divided among them in the ratio of their one day’s (or one hour’s) work.


 Time and Work Exe-11 A,Class-8 RS Aggarwal ICSE Maths Solutions Goyal Brothers Prakashan

(Page- 145-146)

Question 1:

A can do a piece of work in 15 days while B can do it in 10 days ……………….. to do it ?

Question 2:

A, Band C can do  a piece of work in 12 days, 15 ………………….. all together finish it ?

Question 3:

A and B together can do ………………… take to do it ?

Question 4:

……………………

……………………

…………………..

……………………

Question 20:

A pipe can fill a tank in 16 hours. Due to a leak ………………… leak take to empty it ?


Time and Work Exe-11 B,

Goyal Brothers Prakashan ICSE Class-8 Mathematics

(Page 146-147)

Question 1:

If a work can be completed by A in 30 days and by B in 60 days, then the number of days taken by them to finish the work, working together, is :

……………..

Question 2:

A can do a job in ……………. do the job alone ?

……………….

Question 3:

…………………….

…………………….

…………………….

Question 12:

A cistern can be filled by pipes A and B in ……………… will be  full in

…………………

–: End of Time and Work Solutions for ICSE Class-8  :–

Return to- RS Aggarwal Solutions for ICSE Class-8 Goyal Brothers Prakashan

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