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Let the distance be ‘D’ km According to the question, Downstream speed x + y = d/10 or d = 10 (x+y) .......... (i) Upstream speed x-y = d/15 or d = 15(x-y) ........... (ii) Comparing (i) & (ii) 10(x+y) = 15(x-y) 2(x+y) = 3(x-y) 2x + 2y = 3x - 3y x = 5y Hence, y = Speed of the current = 9 km/hour. Speed of boat, x = 5 × 9 = 45 km/hr
Traveling at a speed of 's' km/hr, 'C' requires 22 seconds to complete one lap around the perimeter of a circular track with a radius of 35 meters. Dete...
A Bus moving at a speed of 's' km/h can pass a stationary person in 16 seconds and a tunnel Bridge that is 240 meters long in 28 seconds. Determine the ...
Find the distance travelled (in km) by the truck to reach point B from point A, if a car cover 27% the same distance in 2 hours 42 minutes and a truck c...
Three persons named P, Q, R started their journey at 9.30 AM, 11.30 AM, 2 PM respectively from A to B. The speed of Q is √625 m/sec. Q reached the des...
The speed of a bike increases by 4 km/hr after every 1 hour. If the distance travelled by the bike in 1st hour is 20 km, the find the total distance tra...
Speed of a car and a bus is 25 km/h and 15 km/h, respectively. If the time taken by the car to cover a distance of ‘8x’ km is 1 hour less than time ...
In a 250-metre race, ‘A’ beats ‘B’ by 16 seconds or 80 metres. Find the time taken by ‘B’ to finish the race.
The speed of a train is 36 km/hr and it takes 10 seconds to cross a man. Find the time taken by train to cross a platform if the ratio of the length of ...
If 'P' was 10 minutes late to the office one day, he decided to increase his vehicle's speed by 5 km/h the next day, allowing him to arrive on time. Giv...
In a 1500-metre race, 'Sahil' beats 'Rohan' by '300' metres and 'Kabir' by '450' metres. If 'Rohan' and 'Kabir' participate in a 700-metre race, and 'Ka...
