Question
A boat travels 48 km downstream in 4 hours and 24 km
upstream in 6 hours. What is the speed of the boat in still water?Solution
Let the speed of the boat in still water be B km/h and the speed of the stream be S km/h. Downstream speed = B + S, and upstream speed = B - S. Downstream, distance = 48 km, time = 4 hours: B + S = 48 / 4 = 12 km/h. Upstream, distance = 24 km, time = 6 hours: B - S = 24 / 6 = 4 km/h. Now, solve the two equations: B + S = 12 B - S = 4 Add the two equations: 2B = 16 B = 8 km/h So, the speed of the boat in still water is 8 km/h. Correct Option: a) 8 km/h
On which floor does C lives? If A, B, C, D, E are living in a building. The lowermost floor of the building is numbered 1 its above floor numb...
Six people, J, K, L, M, N, and O, went to Chennai, on different days from Sunday to Friday, of the same week of February, 2024. How many persons went t...
In which direction is point B with respect to point C?
Statements:
I. F is to the east of C, which is to the east of E. D is to the nor...
S, B, T, H, Mand Rare sitting around a circular table. S, Band Mare males while the rest are females. Who are the neighbours of S?
I. Tdoes not w...
A question is given, followed by two statements numbered (I) and (II). You have to decide whether the data provided in the statements is sufficient to ...
Seven persons, L, M, N, O, P, Q and R goes for vacation in seven different months among January, February, March, April, May, June and July of the same ...
Seven persons J, K, L, M, N, O and P, studies in different school F, G, H, I, D, E and C and each of them like different fruits among Apple, Pear, Grape...
How many days did Lalit take to complete his project?
I. Kishore correctly remembers that Lalit took more than 5 days but less than 11 days to...
What is the position of A with respect to B in a round table seating arrangement facing towards the centre?
I. Seven persons A, B, C, D, E, F and...
Six persons P, Q, R, S, T and U are sitting around a circular table facing the centre but not necessarily in the same order. Who sits third to the left...
Relevant for Exams:
