Question
Time taken by boatman to travel a distance of (d + 60)
km downstream and (d + 120) upstream is 10 hours and 20 hours respectively, and the downstream speed of boatman is 25% more than speed of boatman in still water. Find the value of 'd'.Solution
ATQ; Let, the speed of boat in still water and stream speed be ‘B’ km/hour and ‘s’ km/hour respectively. According to question, (B + s) = 1.25 × B 0.25B = s B = 4s … (i) Also, (d+ 60) = 10(B + s) Using equation (i), we get, (d + 60) = 10(4s + s) = 50s … (ii) Also, (d + 120) = 20(B – s) Using equation (i), we get, (d + 120) = 20(4s - s) = 60s … (ii) Using equation (ii) and (iii), we get, (d + 60)/5 = (d + 120)/6 6d + 360 = 5d + 600 d = 600 – 360 = 240
What should come in place of the question mark (?) in the given series based on the English alphabetical order?
YFD, VJA, SNX, PRU.?
Read the given statement and conclusions carefully. Decide which of the given conclusions is/are true based on the statement.
Statement:
�...
Which two mathematical signs should be interchanged to make the given equation correct?
(75 + 15) × 27 × 1 – 9 ÷ 7 × (135 + 3) – 10 ÷ (1...
In a certain code language, ‘JSEV’ is written as ‘MUHX’, and ‘AFRQ’ is written as ‘DHUS’. How will ‘ZTHN’ be written in that languag...
Read the given statements and conclusions carefully. Assuming that the information given in the statements is true, even if it appears to be at variance...
Six persons – L, M, N, O, P and Q – are sitting around a circular table facing the centre, but not necessarily in the same order. O is sitting secon...
Select the option is related to figure D in the same way as figure A is related to figure B.
The following Venn diagram shows Men's profession as Doctors and Chess Players.
Which figure should replace the question mark (?) if the following figure series were to be continued?
Relevant for Exams:
