Question
The speed of a boat in still water is 12 km/h , and
the speed of the stream is 3 km/h . How much time will it take to travel 30 km upstream  and 30 km downstream ?Solution
Upstream speed = 12 − 3 = 9 km/h Downstream speed = 12 + 3 = 15 km/h Time upstream = 30 / 9 = 10/3 hours Time downstream = 30 / 15 = 2 hours Total time = 10/3 + 2 = 10/3 + 6/3 = 16/3 hours = 5⅓ hours
If 98 # 86 = 120 and 59 # 95 = 90, then 79 # 98 = ?
‘105' is related to '15' following a certain logic. Following the same logic, '623' is related to '89'. To which of the following is '784’ related, ...
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Some equations are solved based on a certain system. On the same basis find out the correct answer for the unsolved equation. Â
8 – 4 – 2�...
Given set: Â [20, 82, 31]
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Select the option that is related to the third number in the same way as the second number is related to the first number.
14 : 210 : : 18 :?
Burma : Kyat:: Israel: ?
Select the option in which the numbers are related in the same way as the numbers of the following set:
(5, 500, 10)
If 68 # 34 = 238 and 39 # 204 = 243, then 45 # 20 = ?
