The downstream speed of a boat is 6 km/hr more than its upstream speed and the ratio of the speed of the boat in still water to the speed of the stream is 8:3. Find the total time taken by boat to travel 33 km downstream and 25 km upstream?
Let the speed of boat in still water be x km/hr and that of stream be y km/hr. ATQ, ⇒ (x + y) – (x – y) = 6 ⇒ y = 3 km/hr ⇒ x = 3 × 8/3 = 8 km/hr Required time = [33/(8+3)] + [25/(8−3)] = 8 hr
Gopal is son of Paras’s father’s sister. Arun is son of Tanya who is mother of Sachin and grandmother of Paras. Vishal is father of Heena and grandf...
Which of the following statements is true?
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B has two sons and one daughter. G and J are the two married sons of B. F is the son of G. I is the daughter of C. E is married to G. C is married to J....
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