Question
P alone can finish a piece of work ‘M’ in 8 days
while Q takes 4 days to finish it alone. P, Q and R working together can finish the work ‘N’ which is 7 times of work ‘M’ in 8 days. How long will R take to finish work ‘N’, when working alone?Solution
Let the work ‘M’ = 8 units (LCM of 8 and 4) Efficiency of P = 8/8 = 1 units Efficiency of Q = 8/4 = 2 units Efficiency of P, Q and R = (8 × 7)/8 = 7 units per day Efficiency of R = 7 – (1 + 2) = 4 units per day Time taken by R to finish work ‘N’ = 56/4 = 14 days
The current age ratio of Aman to Bheem is 5:6. What is Aman's current age?
Statement I: Bheem's age 18 years from now wil...
A boat can travel 225 km downstream in 5 hours. If the speed of the boat in still water is 7 times the speed of the stream, how m...
A man standing on the top of a cliff observes a boat at an angle of depression of 45°. He then moves 30 meters further down the cliff, and the angle of...
What is the mean of the following data given below:
3,7,9,5,11,13,8,12,15,12,4
'P' sold an item at a profit of 40%. If the cost price of the item had been Rs. 150 less and its selling price had been Rs. 30 mo...
- VLC Media Player is an example of which category of application software?
A triangle has sides 7 cm, 24 cm, and 25 cm. A circle is inscribed in the triangle. What is the area of the triangle not covered by the circle?
The following table shows the number of cars sold by a dealership in the first six months of the year.
Relevant for Exams:
