Question
A2 type ‘P’ pipes can fill
a tank in 640 hours, while B2 type ‘Q’ pipes can fill the same tank in 490 hours. (10A × 4B) type ‘P’ pipes can fill the same tank in how many hours? (Efficiency of a type P and a type Q pipe is same)Solution
A2 × 640 = B2 × 490
A2/B2 = 490/640
A2/B2 = 49/64
A/B = 7/8
A = 7B/8
(10A × 4B) type 'P' pipes = 10 × 7B/8 × 4B = 35B2
Required time = (B2 × 490)/(35 × B2) = 14 hrs
More Time and work Questions
230 192 172 ? 122 100
...What value should come in the place of (?) in the following number series?
64, 80, 104, ?, 176, 224
97, 106, ?, 195, 411, 460
What will come in place of the question mark (?) in the following series?
29, 42, ?, 95, 135, 184
Find the missing term:
2, 6, 15, 31, 56, ?
32   48   96   ?   720   2520
82, 98, 130, 178, 242, ?
4 10 ? 62.5 156.25 390.625
...140, 146, 170, 224, ?, 470
7 47 ? 223 359 527
...
