Question 14 Marks
Three labourers A, B and C can individually build or break a wall in 30 days, 60 days and 20 days respectively.
1. In how many days can A and B together build the wall ?
(a) 15 days$\quad$(b) 20 days$\quad$(c) 45 days$\quad$(d) 90 days
2. In how many days will the wall be built, if A builds it and B breaks it simultaneously?
(a) 45 days$\quad$(b) 60 days$\quad$(c) 75 days$\quad$(d) 90 days
3. In how many days will the wall be built, if all the three labourers $A , B$ and C are employed to build it?
(a) 10 days$\quad$(b) 12 days$\quad$(c) 15 days$\quad$(d) 20 days
4. How many days will it take to build the wall, if A and B work together to build it while C breaks it simultaneously?
(a) 75 days$\quad$(b) 90 days
(c) 120 days$\quad$(d) The wall will never be built
1. In how many days can A and B together build the wall ?
(a) 15 days$\quad$(b) 20 days$\quad$(c) 45 days$\quad$(d) 90 days
2. In how many days will the wall be built, if A builds it and B breaks it simultaneously?
(a) 45 days$\quad$(b) 60 days$\quad$(c) 75 days$\quad$(d) 90 days
3. In how many days will the wall be built, if all the three labourers $A , B$ and C are employed to build it?
(a) 10 days$\quad$(b) 12 days$\quad$(c) 15 days$\quad$(d) 20 days
4. How many days will it take to build the wall, if A and B work together to build it while C breaks it simultaneously?
(a) 75 days$\quad$(b) 90 days
(c) 120 days$\quad$(d) The wall will never be built
Answer
View full question & answer→1. (b) 2. (b) 3. (a) 4. (d)