15. A tank can be filled by one tap in 20 mi
and by another in 25 min. Both the tap
are kept open for 5 min and then the
second is turned off. In how many
minutes more is the tank completely
filled?
(b) 11 min
(c)15 min
(d) 17 min
2.
1
(a) 6 min
Answers
Answered by
2
Answer:
11
Step-by-step explanation:
A and B start work
A take 20 min
B take 25 min
take LCM (20,25)= 100
1 mint work of A and B
A fill 5 part and B fill 4 part
when A and B both work for 5 min 45 part of tank fill (4+5)×5= 45
remaining work 100-45 =55
remaining work done by A in 55/5 = 11 mint
Similar questions