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.
In a certain code language, ‘INVITATION’ is coded as ‘JMWHUZUHPM’. How will ‘RECESSION’ be written in that language?
In a certain code language, ‘890’ means ‘provided itself produce’, ‘825’ means ‘any for produce’ and ‘607’ means ‘change itself s...
In a certain code language, ‘TORN’ is written as ‘4’ and ‘POWER’ is written as ‘5’. What will be the code for ‘HEALTHY’ in that code...
Answer the questions based on the information given below:
Exams are conducted on 9th and 24th of June, July, August and September in a year. E...
What is the code for ‘Playing’?
In a certain code language, "PLANE" is coded as 47and "TRAIN" is coded as 57. How will "FLIGHT" be coded in that language?
In a certain code, if FRESH is coded as 6-36-15-76-40, what is the code for STALE?
Which of the following is the code for ‘no’?
In a certain code language, ‘PREFER’ is coded as ‘KIVUVI’. What is the code for ‘DEFINE’ in that code language?