Question
The angle of elevation of a ladder leaning against a
wall is 45 and the foot of the ladder is 10 m away from the wall. The length of the ladderSolution
Let the length of the ladder =AC Cos 45° =AC/10 1/ √2 = AC/10 AC =1.414×10=14.14 meter. 
Two pipes A and B can fill a tank in 12 hours and 16 hours, respectively. A third pipe C can empty the tank in 24 hours. If all three pipes are opened t...
A and B together can complete a task in 12 days. B alone can complete it in 20 days. How long will it take A to complete the task if he works alone?
From a group of 7 men and 4 women, a committee of 4 persons is to be formed. The probability that the committee has at least one woman is:
In a 240 ml mixture containing milk and honey, honey makes up 56.25% of the total mixture. After removing 'p' ml of this mixture, 8 ml of honey is added...
A group of 20 boys can complete a task in 15 days. Similarly, 24 girls can finish the same task in 20 days. If the ratio of the e...
Find the difference between the smallest number of five digits and greatest number of four digits?
Determine the mean of the following observations:
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