A. 3 hrs.
B. 4 hrs,
C. 5 hrs.
D. 6 hrs.
✅ The correct answer is option D. 6 hrs..
X’s 1 hour work = 1/10
X’s 1 hour work = 1/10
Y’s 1 hour work = 1/15
(x+y)’s 1 hour work = 1/10+1/15=5/30=1/6
Both the taps can fill the tank in 6 hrs.
Y’s 1 hour work = 1/15
(x+y)’s 1 hour work = 1/10+1/15=5/30=1/6
Both the taps can fill the tank in 6 hrs.