Question
Pipe A and pipe B can fill the empty tank in 18 hours and
30 hours respectively, whereas pipe C can empty the full tank in ‘x’ hours. Find the value of ‘x’ if pipes A, B and C together can fill the empty tank in 12 hours.Solution
Let the capacity of the tank = 180 liters (LCM of 18, 30, and 12)
Amount of water filled by pipe A in one hour = 180 ÷ 18 = 10 liters
Amount of water filled by pipe B in one hour = 180 ÷ 30 = 6 liters
Amount of water filled by pipes A, B and C together in one hour = 180 ÷ 12 = 15 liters
Amount of water taken by pipe C alone in one hour = 10 + 6 – 15 = 1 liter
Time taken by pipe C alone to empty the tank = 180 ÷ 1 = 180 hours
Determine the sum of the first 16 odd numbers.
For which range of 'p' does the expression 19p - 2p²- 35 have a positive value??
The remainder obtained when (47³ + 35³) is divided by 41 isÂ
16Â Â Â Â Â Â Â Â Â Â 4Â Â Â Â Â Â Â Â Â Â Â Â Â 2Â Â Â Â Â Â Â Â Â Â Â Â Â 1.5Â Â Â Â Â Â Â Â Â 1Â Â Â Â Â Â Â Â Â Â Â Â Â 1.875
...The sum of the digits of a two-digit number is 9, and when the digits are reversed, the number decreases by 45. Find the changed number.
Find the unit digit of (76101 - 6).
Find the sum of all natural numbers less than 1,000 that are divisible by both 3 and 5 but not by 7.
How many times I write digit ‘1’ in first hundred natural numbers?Â
Relevant for Exams:
