Question
The speed of the boat in still water is 12 km/hr and the
speed of the stream is 9 km/hr. A boat goes 105 km downstream with its usual speed but at the time of returning the speed of the boat in still water is doubled. Find the total time taken by boat to cover the whole distance. TYPE 34Solution
According to the question, Required time = 105/(12 + 9) + 105/(24 – 9) => 105/21 + 105/15 => 5 + 7 = 12 hours
Select the correct combination of mathematical signs that can sequentially replace the “@” sign and balance the following equation.
12@5@7@2@...
If 65 + 54 = 2, 71 + 62 = 10, then 73 + 83 = ?
If A denotes ‘addition’, B denotes ‘multiplication’, C denotes ‘subtraction’, and D denotes ‘division’, then what will be the value of t...
In a certain code language, '+' represents '÷', ' - ' represents ' X ', '÷' represents '+' and ' X ' represents '-'. Find out the answer to the follow...
Select the correct combination of mathematical signs to replace the '@' signs and balance the given equation.
22 @ 6 @ 18 @ 17 @ 2
A shopkeeper sells rice in such a way that the selling price of 950 gm is the same as the cost price of one kilogram. Find his gain percent.
If '+' means 'division', ' X ' means 'addition', ' - ' means 'multiplication' and '÷' means 'subtraction', then what is the value of the following expr...
If ‘+’ stands for ‘division’; ‘×’ stands for ‘addition’; ‘–’ stands for ‘multiplication’; ‘÷’ stands for ‘subtraction�...
If ‘÷’ means ‘-’, ‘-’ mean ‘+’, ‘+’ means ‘×’ and ‘×’ means ‘÷’, compute the value of the expression:
135 × ...
Which of the following interchange of sign would make the given equation correct?
45 × 9 + 5 ÷ 4 = 25
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