Question
A cheetah can catch a deer running with a speed of 90
km/h and is 75 meters ahead of it, in 15 seconds. Find the time taken by the cheetah to catch a zebra that is 160 metres ahead of it and is running with a speed which is 80% of that of the deer.Solution
Speed of the deer = 90 km/h = 90 × (5/18) = 25 m/s Distance covered by the cheetah in 15 seconds = 75 metres + distance covered by the deer in 15 seconds = 75 + 25 × 15 = 75 + 375 = 450 metres So, speed of the cheetah = 450/15 = 30 m/s Speed of the zebra = 25 × (80/100) = 20 m/s So, relative speed of the cheetah with respect to the zebra = 30 – 20 = 10 m/s Hence, time taken by the cheetah to catch the zebra = 160/10 = 16 seconds
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...Find the wrong number in the given number series.
16, 24, 36, 54, 81, 120.5
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...- Find the wrong number in the given number series.
2, 27, 252, 877, 2102, 4127 Find the wrong number in the given number series.
8, 16, 24, 32, 32, 64
Find the wrong number in the given number series.
7, 15, 46, 93, 282, 561
324, 314, 294, 264, 224, 184
Find the wrong number in the given number series.
11, 30, 67, 133, 219, 346
In each of the following giving number series, a wrong number is given. Find out the wrong number?
82, 81, 86, 110, 168, 287
- In the given number series, find the wrong number.
3, 6, 12, 25, 48, 96, 192
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