Start learning 50% faster. Sign in now
Let the speed of the boat in still water be x km/h, and the speed of the stream be y km/h. Downstream speed = (x + y) km/h, and upstream speed = (x - y) km/h. Downstream: 40 / (x + y) = 5 Upstream: 40 / (x - y) = 8 From the downstream equation: x + y = 40 / 5 = 8. From the upstream equation: x - y = 40 / 8 = 5. Now solve: x + y = 8 x - y = 5 Adding both equations: 2x = 13 x = 6.5 km/h Thus, the speed of the boat in still water is 6.5 km/h.
How many boxes are kept between box W and the box which contains Dates?
Who lives three floors above V?
G is going to attend conference in which country?
Who among the following person attends the seminar event along with F in the same month?
If J and M lives between K and A, then how many person live below J?
If in a certain code language ‘deal work’ is coded as ‘ynr fik’, then which of the following is the code of ‘when talent school’?
...Which of the following pair born in the same month?
A's marks were how much more than that of B?
How many persons live below F (in the same type of flat)?