A motorboat whose speed is 20 km/h in still water takes 30 minutes more to go 24 km upstream than to cover the same distance downstream. If the speed of the boat in still water is increased by 2 km/h, then how much time will it take to go 39 km downstream and 30 km upstream?
SSC CGL 2021-11.04.2022-1
A pole 23 m long reaches a window which is 3\(\sqrt{5}\) m above the ground on one side of a street. Keeping its foot at the same point, the pole is turned to the other side of the street to reach a window 4\(\sqrt{15}\) m high. What is the width (in m) of the street?
SSC CGL 2021-11.04.2022-2
A boatman can row his boat in still water at a speed of 9 km/h. He can also row 44 km downstream and 35 km upstream in 9 hours. How much time (in hours) will he take to row 33 km downstream and 28 km upstream?
SSC CGL 2021-11.04.2022-3