Maths quiz

Sufyan ukaye (Student) (60 Points)

30 July 2012

Good Afternoon frndz,

Try to solve out the following quiz.

"If A Takes 12 Hours to complete a certain work & B Takes 8 Hours to do the Same Work, How Much Time will it take if both do it togethor??"

Plz Reply showing the Working..

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4 Replies

Manmohan ACA, CS (Chartered Accountant ) (14243 Points)
Replied 30 July 2012

class 3

A takes 12 hours to do1 work

so in 1 hour A will do 1/12 ( one by 12) work ...

similarily B takes 8 hours to do1 work

so in 1 hour A will do 1/8 ( one by 8) work ...

so togather in one hour A and B do (1/12+ 1/8 ) = 5/24 hours...

so 5/24 work is done in 1 hours

therefore , to do one work they will need 1/(5/24) = 24/5 = 4.8 hours..

Tehsinkhan Pathan (CA CMA DISA(ICAI) B.COM) (3956 Points)
Replied 30 July 2012

A's 1 hour's work = 1/12

B's 1 hour's work = 1/8

(A + B)'s 1 hour's work = (1/12+1/8) = 5/24

Both A & B together will finish the work in 24/5 hours (1*1/(5/24))

Nirali (No) (125 Points)
Replied 30 July 2012

09:36 hours as per eficiency.

PRITAM JAIN, CA , CS (Practising CA CS) (398 Points)
Replied 31 July 2012

The Work has already been done.....

Why will they do it again????

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