Question
The hardness of water is usually expressed in terms of
what unit?Solution
Water hardness is typically measured in parts per million (ppm) of calcium carbonate, reflecting the concentration of calcium and magnesium ions.
P can do a piece of work in 15 days, Q can complete double the work in 60 days and R can do the work in 40 days. If all of them together earn Rs. 3000, ...
- Pipes X and Y can fill a water tank individually in 24 minutes and 36 minutes, respectively. A third pipe Z can empty the tank in 72 minutes. If all three ...
‘X’ and ‘Y’ can do a task together in 15 days. If ‘X’ alone takes 25 days to complete it, then how much time will ‘Y’ take to finish the...
'A' and 'B' together can do a piece of work in 12 days while 'B' and 'C' together can do the same work in 18 days. 'A' started the work alone and worked...
X and Y alone can complete a work in 10 and 40 days, respectively. 50% of the work is completed by Z in 20t days, and the remaining work is completed by...
A can do a work in 10 days and B in 15 days. If they work on it together for 4 days then in how many days the remaining work will be completed by B?
Time taken by 'A', 'B' and 'C' to complete a work is 51 days, 85 days and 102 days respectively. All of them started the work together but 'B' and 'A' l...
‘M’ is 60% more efficient than ‘N’. ‘N’ started the work alone and worked for 16 days and after that ‘N’ is replaced by ‘M’. If the ...
John does ½ piece of work in 3 hours, Joe does ¼ of the remaining work in 1 hour and George finishes remaining work in 5 hours. How long w...
The speeds of Vishank and Karun are 60 km/hr and 90 km/hr. Initially, Karun is at a point P and Vishank is at a place Q. The distance between P and Q i...
