The speed of a motorboat in still water is 50 km/hr. If the motorboat travels 120 km along the stream in 1 hour 30 minutes, then the time taken by it to cover the same distance against the stream will be
Let the speed of the current be x km/hr Rate Downstream = (x+ 50) km/hr According to the question 120/(x+50) = 1 hour 30 minutes 120/(x+50) = 3/2 240 = 3x + 150 x= 30 km/hr Rate upstream = 50 – 30 = 20 km/hr Required time = 120/20 = 6 hours
Which of the following numbers will replace the question mark (?) in the given series?
68, 77, 89, 105, ?, 153
Among five persons Sunny, Swati, Somya, Surbhi and Sapna; Swati was elder to Somya but younger to Sunny. Surbhi was elder to Sunny who was just elder to...
If + means −, − means ×, × means ÷, and ÷ means +, what will be the value of the following expression?
5 ÷ 5 + 5 – 10 × 10 = ?
...Choose the figure that is different from the rest.
Select the Venn diagram that best represents the relationship between the following classes: Oxygen, Hydrogen and Gases.
Select the option figure that can replace the question mark (?) in the given figure to complete the pattern.
In the following question below are given some statements followed by some conclusions based on those statements. Taking the given statements to be true...
TREE is related to YXLM in a certain way based on the English alphabetical order. In the same way, GAME is related to LGTM .
Which of the ...
Select the option figure in which the given figure is embedded. (rotation is NOT allowed)
In the following question, select the missing number from the given series.
?, 3, 5, 7, 11, 13
