Question
Pipe ‘A’ can fill a tank in 30 hours while pipe
‘B’ can empty it in 40 hours. They were operated on alternate hours starting with pipe ‘A’. Find the percentage of tank filled this way in 54 hours.Solution
Let the total capacity of tank be 120 units Efficiency of pipe ‘A’ = 120/30 = 4 units/hour Efficiency of pipe ‘B’ = 120/40 = 3 units/hour Tank filled in 2 hours = (4 – 3) = 1 units Therefore, tank filled in (2 × 27 = 54 hours) = 1 × 27 = 27 units Required percentage of tank filled = (27/120) × 100 = 22.5%
Convert 32.56 into binary system?
- What is the minimum number that should be added to 850 to make it perfectly divisible by 37?
Find the range of the given data:
110, 135, 120, 95, 105, 115, 125, 140
If the numerator of a fraction is increased by 300% and the denominator is increase by 600%.The resultant fraction is 1/2. What was the original fraction?
Two friends received a bonus of ₹3,000 each in their bank accounts. They already have ₹47,000 and ₹57,000 in their respective bank accounts. The r...
- Find the sum of all two-digit numbers that are exactly divisible by 7.
The value of
The average marks scored by boys and girls in a class are 48 and 32, respectively. The total marks obtained by the entire class is 1680, with 40 student...
- When 65% of a number is added back to the number, the increase is found to be 39. What is the final value obtained?
A two-digit number has a sum of its digits equal to 8. Additionally, if 27 is subtracted from this number, the resulting number has its digits reversed....
Relevant for Exams:
