Question
The downstream speed of a boat is 8 km/hr more than its
upstream speed and the ratio of the speed of the boat in still water to the speed of the stream is 11:4. Find the total time taken by boat to travel 60 km downstream and 42 km upstream?Solution
Let the speed of boat in still water be x km/hr and that of stream be y km/hr. ATQ, ⇒ (x + y) – (x – y) = 8 ⇒ y = 4 km/hr ⇒ x = 4 × 11/4 = 11 km/hr Required time = [60/(11+4)] + [42/(11−4)] = 10 hr
If 33 @ 16 = 15' and 41 @ 32 = 7', then 64 @ 33 = ?'. What will come in place of question mark?
By interchanging the given two signs which of the following equation will be not correct?
× and –
Select the set in which the numbers are related in the same way as are the numbers of the following sets.
(NOTE : Operations should be performed ...
Select the option that is related to the fifth term in the same way as the second term is related to the first term and the fourth term is related to t...
Select the option that is related to third number-cluster in the same way first number cluster is related to second number-cluster.
81: 65 :: 7...
Select the set in which the numbers are not related in the same way as are the numbers of the following set. NOTE: Operations should be performed on th...
Select the option that is related to the third letter-cluster in the same way as the second letter-cluster is related to the first letter-cluster.
...How many numbers are immediately preceded and succeeded by symbol?
6 7 @ # 2 8 8 $ 5 4 % 5 ! & # * 7 * + 9
Select the option that is related to third letter cluster in the same way second letter cluster is related to first letter cluster.
DECIMAL: Z...
Select the option in which the numbers are not related in the same way as are the number of the following set.
(43, 55, 80)
