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Speed of the deer = 36 km/h = 36 × (5/18) = 10 m/s Distance covered by the cheetah in 12 seconds = 45 metres + distance covered by the deer in 12 seconds = 45 + 10 × 12 = 45 + 120 = 165 metres So, speed of the cheetah = 165/12 = 13.75 m/s Speed of the zebra = 10 × (70/100) = 7 m/s So, relative speed of the cheetah with respect to the zebra = 13.75 – 7 = 6.75 m/s Hence, time taken by the cheetah to catch the zebra = 135/6.75 = 20 seconds
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If the sum of upstream and downstream speed is 48 km/hr and the speed of the current is 4 km/hr. Then find time taken to cover 84 km in downward?
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The speed of a boat in still water is 7 km/hr and the speed of the stream is 2.5 km/hr. A man rows to a place at a distance of 42.75 km and comes back t...
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A man row a boat 1 km in 5 min, along the stream and 6 km in 1hrs against the stream, The speed of the stream will be
A boat takes 5 hours longer to travel 15 km upstream than it does to travel 20 km downstream. The speed of the boat in still water is 5 km/hr. Calculate...
Ratio of downstream and upstream speed of a boat is 5:2. If the speed of stream is 3 km/h, find the distance travelled by boat in downstream in 2 hours.
The speed of a boat in downstream and upstream is 30 km/hr and 22 km/hr, respectively. Find the approximate time taken by the boa...
