Question
Sheila walks at the speed of her usual speed (20/21) and
determines a clear distance in eight minutes more than the time it takes in normal speed. Calculate the normal time it takes to determine a certain distance.Solution
Let the speed of the Sheila be 21 unit Speed of the Sheila after decrement = 21 x 20/21 = 20 unit Speed ratio = 21: 20 Time ratio = 20:21 ... [... Time taken is inversely proportional to speed] 21-21= 1 unit ATQ- 1 unit =8 min 20unit = 8 x 20 = 160 min The total time taken by Sheila at the usual speed was 160 min.
Find the wrong number in the given number series.
3, 8, 15, 24, 35, 50, 63
3, 4, 9, 28, 116, 566, 3397
Find the wrong number in the given number series.
2, 6, 24, 96, 285, 568, 567
1990,1877, 1794, 1711, 1638
1, 18, 44, 81, 131, 198
11Â Â Â Â Â 29Â Â Â Â Â Â 45Â Â Â Â Â 59 Â Â Â Â Â Â 70 Â Â Â Â Â Â Â 81
...Find the wrong number in the given number series.
3, 8, 15, 24, 35, 50, 63- Find the wrong number in the given number series.
10, 14, 23, 48, 99, 218 Find the wrong number in given number series.
2556, 2613, 2734, 2841, 3012, 3221
599, 631.9, 667.5, 707.5, 751.6, 800, 852.9
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