Question
Pipe 'A' is 6 times as efficient as pipe 'B'. Pipe 'C',
which is one-sixth as efficient as pipe 'B', can fill a tank alone in 18 hours. Find difference between time taken by pipe 'C' to fill 66.67% of the tank and time taken (in minutes) by pipe 'A' to fill the tank completely.Solution
Let the efficiency of pipe 'C' be 'x' litres/hour.
So, total capacity of the tank = '18x' litres.
Efficiency of pipe 'A' = x × 6 × 6 = '36x' litres/hour
So, time taken by pipe 'A' to fill the tank = 18x / 36x = 0.5 hours
And, time taken by pipe 'C' to fill 66.67% of the tank = (18x × 2/3) / x = 12 hours
So, required difference = 12 - 0.5 = 11.5 hours = 11.5 × 60 = 690 minutes
In each of the following number series, one term is missing. Find the missing term.
50, 45, 37, 26, 12, ?
23 45 89 155 ? 353
? , 864, 432, 144, 36, 7.2
In each of the following number series, one term is missing. Find the missing term.
5, 10, 20, 40, ?, 160
1, 26, 75, 156, 277, ?
What will come in place of the question mark (?) in the following series?
6, 13, 29, 63, ?, 259
18, 30, 54, 90, 138, ?
200 ? 96 38.4 7.68 0
Find the next term in the series:
3, 10, 21, 36, 55, ?
What value should come in the place of (?) in the following number series?
100, 149, 68, 189, ?, 245
