Question
Tap A and Tap B fill a drum of volume 494 liters in 19
minutes. If their efficiencies are in the ratio x:y respectively and B alone takes to fill the cistern 49.4 minutes. Find x-y.Solution
A+B B Time 19 : 49.4 Efficiency 49.4 : 19 26 : 10 Efficiency of A+B = 26 Efficiency of B = 10 Efficiency of A = 26 – 10 = 16 Ratio = x:y = 16:10 So, x – y = 16 – 10 = 6
12 11 21 62 ? 1234
12, 23, 68, 271, 1354, ?
24 72 180 360 540 ?
30 15 15 30 120 ?
...440 482 526 572 ? �...
61 71 86 ? 131 161
...If 4 10 16 26 x 50
Then find the value of (x² - 1) + ( x² + 1).
...If 10 9 38 x 5428
Then, 2x² + 1 = ?
...In each of the following questions the number series is given. One term of the series is denoted by x. You have to calculate of value of x and by using ...
12, 16, 25, 41, 66, ?
