Question
Speed of a boat in still water to speed of boat in
upstream is 10:7. If the boat can travel 390 km in downstream in 5 hours, then find the time taken by the boat to cover 18 km in still water.Solution
Let speed of boat in still water and speed of boat in upstream be ‘10x’ km/h and ‘7x’ km/h, respectively. Speed of stream = 10x – 7x = 3x km/h Speed of boat in downstream = 10x + 3x = 13x km/h So, 13x = 390/5 = 78 Or, x = 6 Speed of boat in still water = 10 × 6 = 60 km/h Desired time = 18/60 = 18 minutes
Which of the following statement is/are true?
I. H faces the one who sits just left of J
II. K sits exactly between E and G
III. On...
What is the position of S with respect to Q?
Amrita likes which of the following channels?
What is the position of F with respect to H?
Which of the following statement(s) is/are false?
I. Only one person sits between P and the one who likes Blueberry when counted left of P.
<...Four from the following five are related in a certain way and hence form a group. Find the one who doesn’t belong to that group.
Six students (F, G, H, I, J and K) sit in a linear row facing south in a classroom but not necessarily in the same order. One person sits between F and...
Which of the following combination is correct?
Five persons D, E, F, G and H are sitting in straight line facing towards the north. F sits second from the left end. Only one person sits between F an...
How many people live between the floors on which Tanya and the one eating Sandwich live?
