Question
A man can go on a motor boat with a speed of 25 km/hour
in still water to a certain upstream point and come back to the starting point in a river which flows at a speed of 15km/hour. Find the average speed of motor boat for total journey?Solution
More Boats and streams Questions
If (x + 1/x) = 5, then value of x3 + 1/x3 is:
181/8 + 51/4 – 63/8 = ? + 9/2
40% are the passing marks. A student gets 250 marks yet fails by 38 marks. What is the maximum marks?
40.5 ÷ [4/5 of (32 + 18) - 29/2] = ? ÷ 102
20% of 10% of 900 + 84/12 = ?2
242 + 18 × 8 – ? = 356
84% of 800 + 70% of 640 = 14 × ?
[(120)2 ÷24 ×25] ÷ 250 =?
What will come in place of the question mark (?) in the following expression?
25% of 2000 – 50% of 500 = 100% of ?
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