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Distance = Difference in time x (S1 x S2)/(S1 – S2) D = [15 – 7]/60 x {(30 x 45)/[45 – 30]} => (8/60) x (30 x 45)/15 => 12 km Time, T = D/S (take any one of the speed) => 12/30 = 12/30 x 60 = 24 minutes Then, correct time is 24 – 15 = 9 minutes
The speed of a bike increases by 5 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...
In a 550-metre race, ‘A’ beats ‘B’ by 12 seconds or 60 metres. Find the time taken by ‘B’ to finish the race.
‘G’ and ‘H’ started moving towards each other at the same time with a speed of 40 km/hr and 30 km/hr, respectively. If the distance covered by �...
A boat can travel 80 km downstream in 8 hours, and it can travel the same distance upstream in 10 hours. What is the speed of the boat in still water?
‘A’ and ‘B’ started moving towards each other at same time with a speed of 24 km/hr and 12 km/hr, respectively. If the distance covered by ‘A�...
A train 150 meters long crosses a man running in the same direction at a speed of 9 km/h in 15 seconds. It then crosses a platform in 25 seconds. Find t...
Barry and Iris set off simultaneously from point A, aiming to reach point B. Barry travels faster than Iris, with their speeds being in a ratio of 5:3. ...
‘K’ and ‘L’ are going from place ‘X’ to place ‘Y’, which is 1100 km apart. If ‘K’ started 3 hours after ‘L’ but both of them rea...
The speed of a train is 108 km/hr and it takes 14 seconds to cross a man. Find the time taken by train to cross a platform if the ratio of the length of...
