Question
Amit walks for 2 hours at a speed of 's' km/hr, and then
his speed increases by 25 km/hr, covering the remaining distance in 3 hours. If Amit's speed had increased by 20% after 2 hours, and he walked for 5 hours, the total distance covered would have been 30 km more than the initial distance. Determine the initially covered total distance.Solution
ATQ, 1.2s × 5 – (s + 25) × 3 = 30 Or, 6s – 3s = 105 Or, s = 105/3 = 35 Therefore, total distance travelled initially = 2s + 3(s + 25) = 250 km
89Â Â Â Â Â 78Â Â Â Â Â 74Â Â Â Â Â 67Â Â Â Â Â 63Â Â Â Â ?
642 202 541 312 523 ?
...61                          48                          ?                    ...
261Â Â Â Â Â 256Â Â Â Â Â Â 246Â Â Â Â Â Â 231Â Â Â Â Â 211Â Â Â Â Â ?
...21    23    49    152    ?     3086
15, 65, 165, 315, ?, 765
To find the Next number in the given series.
6 9 13 19 29 47 ?
...30 27 20 9 ? - 25
5 ? 205 823 7405 29623
16, 54, 128, ‘?’, 432,686