Question
Pipe ‘A’ and pipe ‘B’ can fill a cistern in 10
minutes and 12 minutes respectively. Pipe ‘C’ alone can empty the cistern in 12 minutes. If all three pipes are opened together then what is the time taken to fill 50% of the cistern?Solution
Let the capacity of the cistern = 60 units Then, efficiency of pipe ‘A’ = 60/10 = 6 units/minute Efficiency of pipe ‘B’ = 60/12 = 5 units/minute Efficiency of pipe ‘C’ = 60/12 = 5 units/minute So, combined efficiency of pipes ‘A’, ‘B’ and ‘C’ = 6 + 5 – 5 = 6 units/minute 50% of the cistern’s capacity = 30 units Therefore, time taken by all 3 pipes together to fill 50% of the cistern = 30/6 = 5 minutes
What will come in place of question mark (?) in the following series?
DLNÂ Â Â Â Â Â Â CKOÂ Â Â Â Â Â BJQÂ Â Â Â Â Â Â ? Â Â Â Â Â ZHX
The following series is based on the English alphabets. Which one of the following will come in place of the question mark in the given alphabetical ser...
How many 8’s are there in the above series which are immediately followed by a prime number?
- Which element is 12th from the right end of the given arrangement?
In the given series, if all the consonants are removed, then which element is ninth from the right end?
- Select the combination of letters that when sequentially placed in the blanks of the given letter series will complete the series.
G _ _ J K _ _ H ... Select the correct combination of letters when sequentially placed in the blanks of the given letter will complete the series.
l l m _ _ _ n o o ...
Select the letter cluster that can replace the question mark (?) in the following series.
ZBKI, XDHM, VFEQ, THBU, ___?_____. PLVC
Select the combination of letters that when sequentially placed in the blanks of the given letter series will complete the series.
P _ S U _ P Q ...
Select the combination of letters that when sequentially placed in the blanks of the given letter series will complete the series.
_ m m n _ o p ...