A wall can be formed in a fix number of days by using 80 labours working 8 hours in a day. How m

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17 Dec 2010 Time and work

A wall can be formed in a fix number of days by using 80 labours working 8 hours in a day.
How many labours are required to form the same wall in same number of days, if they work for 10 hours a day?

OPtion

1) 64
2) 68
3) 72
4) 81
5) 90
6) 100
7) 60
8) 54
9) 48
10) 52

Solution

80 * 8 = x * 10

Hence x = 64

Correct Option: 1 Best Solution (15)

Dr.Dipin Singh   13 years AGO

A wall can be formed in a fix number of days (x) by using 80 labours working 8 hours in a day.
(80*8*x)/(x*10) =64 labours are required to form the same wall in same number of days(x), if they work for 10 hours a day.

Like? Yes (1) | No   

Dr. Divya   13 years AGO

80*8/10=64

Like? Yes (1) | No   

A.P.Singh   13 years AGO

If D is no of days , then total manhours reqd are 8*80*D=640 D.

Then number of men required to form the same wall in same number of days, if they work for 10 hours a day =640D/10*D=64

Like? Yes (1) | No   

SUDESHNA SEN   13 years AGO

Required no.of labours= (80*8)/10= 64..... Option 1)

Like? Yes (1) | No   

Mamon Sengupta   13 years AGO

Required no.of labours= (80*8)/10= 64..... Option 1)

Like? Yes (1) | No   

Trishita Dasgupta   13 years AGO

Required no.of labours= (80*8)/10= 64..... Option 1)

Like? Yes (1) | No   

Sudeshna Sengupta   13 years AGO

Required no.of labours= (80*8)/10= 64..... Option 1)

Like? Yes (1) | No   

Parbati Sen   13 years AGO

Required no.of labours= (80*8)/10= 64..... Option 1)

Like? Yes (1) | No   

Prabir Sen   13 years AGO

Required no.of labours= (80*8)/10= 64..... Option 1)

Like? Yes (1) | No   

ramya   13 years AGO

if 80 labours and 8 hrs means=80*8
then x labours and 10 hrs means=x*10
equate this and solve we get value for x and that is the required no of labours

Like? Yes (1) | No   

Sumandeep Ghosh   13 years AGO

8*80=640hr effort is done by the labour
so by 10hr a day 640/10=64 labour will be needed

Like? Yes (1) | No   

Sathish   13 years AGO

80*8 hours needed = 640 hours
if 10 hours per day in same no. of days,

640/10 labours enuf. = 64!!

Like? Yes (1) | No   

karthik   13 years AGO

using the Formula:
M1*D1*H1 = M2*D2*H2
here
80*d1*8 = m2*d2*10
in given problem d1=d2, hence solving we get
ANS: 64

Like? Yes (1) | No   

annu   13 years AGO

as 80*8*x hours will be equal to y*10*x.
so.64 labours

Like? Yes (1) | No   

hitesh gakhar   13 years AGO

total working hours will be conserved.....
hence, 8*80=10*x
=> x = 64

Like? Yes (1) | No