TW

Question 1

A can do a work in x days
A + b can do a work in Y days
B can do a work in

Answer 1

Xy/y- x days

Question 2

A can do a work in x days
b can do a work in Y days
A + b can do a work in

Answer 2

Xy/ X + y days

Question 3

A can do a work in x days B in y days C in z days together they can do work in

Answer 3

Xyz/xy + y z + ZX

Question 4

Certain number of men can do work in D days
X-Men Less could be finished in e days
Number of men originally

Answer 4

x(d+e)/e

Question 5

Certain number of men can do work in D days
X-Men more could be finished in e days
Number of men originally

Answer 5

x(d-e)/e

Question 6

A is n times as fast / slow as B
Therefore is able to finish a work in 30 days more or less
Time taken to complete the work together

Answer 6

(Dn/ n^2-1) days

Question 7

X men and y women can reap a field in D days

S men and P women can take

Answer 7

D(xy)/xp+ys

Question 8

There is sufficient food left for M men for D days

If after s days X men will leave the place rest of the food will last for

Answer 8

(D-s/ M-X)M

Question 9

There is sufficient food left for M men for D days

If after s days X men will join the place rest of the food will last for

Answer 9

(D-s/ M+X)M

Question 10

if a can do a work in 6 days B can do a work in 18 days if contract for work is rupees X and both of them work together then the share of a and b is given by

Answer 10

(X/x+y )*y. For a

(X/x+y )*x. For B

Question 11

A person can do work in X days with the help of another person b, can do the same work in y days
If they get rupees z for that work then the share of a and b is given by

Answer 11

Share of A

Zy/x

Share of B

Z(x-y)/x

Question 12

A can do a work in x days B can do work in y days they began to work together but a left sometimes later be finish remaining work in Z number of days after which a left is given by

Answer 12

(Xy/X + y) (y-z/y)

Question 13

A group of man decided to do a work in x days
But n of them became absent
If the rest of the group did the work in y days
Then the original number of men is given by

Answer 13

(Ny/y-x)men

Question 14

A can do a work in x days
B can do it in y days
If they work together for D days
A goes away the number of days in which we finish the work is

Answer 14

Y- [1+y/x]d days

Question 15

If a working alone takes X days more then A and B working takes y days more than a and b
Number of days taken by both A and B working together

Answer 15

√xy

Question 16

Time is equal to

Answer 16

Total work/volume

Question 17

if a pipe can fill a tank in x hours and another pipe can empty that ful tank in y then on opening both pipes net part field

Answer 17

1/x-1/y

Question 18

if a pipe can fill a tank in x hours and another pipe can empty the full tank in my hours then opening both the pipes the net part emptied in one hour is

Answer 18

1/y- 1/x