Question 9
(a) A boat can travel with a speed of 13km/h in still water. If the speed of the stream is 4km/h, find the time taken by the boat to go 68km downstream.
(b) Speed of a boat in standing water is 11km/h and the speed of the stream is 1km/h. A man rows to a place at a distance of 240km and comes back to the starting point. Find the total time taken by him.
(c) If Anshul rows a boat 15km upstream and 21km downstream taking 3 hours each time, then find the speed of the stream.
Answer entry: (a) hours;(b) hours;(c) km/h, in that order, numbers only separated by semicolons.
**Editorial input note:** Use no spaces before or after semicolons.
(b) Speed of a boat in standing water is 11km/h and the speed of the stream is 1km/h. A man rows to a place at a distance of 240km and comes back to the starting point. Find the total time taken by him.
(c) If Anshul rows a boat 15km upstream and 21km downstream taking 3 hours each time, then find the speed of the stream.
Answer entry: (a) hours;(b) hours;(c) km/h, in that order, numbers only separated by semicolons.
**Editorial input note:** Use no spaces before or after semicolons.