Let the speed of upstream be x km/hr Speed of downstream = y km/hr 32/x + 40/y =8 ………….(i) 40/x + 32/y = 8(1/2) …………………….(ii) Adding (i) and (ii), we get 72(1/x + 1/y) = 33/2 …………..(iii) Subtract (i) from (ii), we get 8(1/x - 1/y) = 1/2 …………..(iv) Adding (iii) and (iv), we get 2/x = (33/144) + (1/16) 2/x = 42/144 x = 48/7 km/hr Now, 7/48 - 1/y = 1/16 y = 12 km/hr Now, rate of current = 1/2(12 - 48/7) = 18/7 km/hr = 2(4/7) km/hr
In a certain code language, 'ATOM' is coded as '9613’ and 'BOAT' is coded as '1938'. What is the code for 'B' in the given code language?
Which answer figure will complete the pattern in the question figure? (rotation is not allowed)
A statement is followed by two courses of action, numbered I and II. You must assume everything in the statement to be true and on the basis of the info...
From the given option figures, select the one in which the question figure is hidden/embedded. (Rotation is NOT allowed)
Select the option that is related to the fifth letter cluster in the same way as the fourth letter cluster is related to the third letter cluster, and ...
Which figure from the given options would replace the question mark (?) if the following figure series were to be continued?
Statements:
All valleys are mountains.
No sea is a mountain.
Some plains are seas.
Conclusions:
I. Some valleys a...
Select the option that is related to the fifth letter-cluster in the same way as the second letter-cluster is related to the first letter-cluster and th...
Seven athletes A, B, C, D, E, F and G participate in a race. E is ahead of A but behind F. D is ahead of only two athlete. G is running last. C is runni...
If A denotes ‘+’, B denotes ‘×’, C denotes ‘−’, and D denotes ‘÷’, then what will come in place of ‘?’ in the following equation...
