A) 1 hrs
B) 2 hrs
C) \[2\frac{1}{2}\] hrs
D) \[1\frac{1}{2}\] hrs
Correct Answer: B
Solution :
[b] Let B takes x H then A takes \[\left( x+\frac{1}{2} \right)H\] \[\therefore \] \[\left( x+\frac{1}{2} \right)3=x\times 4\] \[6x+3=8x\] 2x = 3 \[x=\frac{3}{2}\] \[\therefore \] \[A\,\,takes\,=\frac{3}{2}+\frac{1}{2}\] = 2 hrs.You need to login to perform this action.
You will be redirected in
3 sec