Question
The time taken by ‘X’, ‘Y’ and ‘Z’ to complete
a task is ‘6n’ days, ‘9n’ days and ‘12n’ days, respectively. What is the ratio of their efficiencies?Solution
ATQ,
Since, efficiency is inversely proportional to time taken
So, ratio of efficiency = (1/6n) : (1/9n) : (1/12n) = 6 : 4 : 3
Which of the following is the correct relation between Quantity I and Quantity II?
Quantity I: A train travels at a speed of 72 km/h. How much ti...
Quantity I : The rate at which the train must run to reduce the time to 30 minutes. A train takes 40 minutes for a journey if it runs at 72 km/hr.
...Quantity I: The age of A is sixteen times that of her son B. If the age of B is 4 years, what is the age of A?
Quantity II: The ratio between the...
Quantity I: A vessel contains a mixture of milk and water in the ratio of 7 : 5. If 9 litre of mixture is sold and replaced by same amount of water the...
If (y/5) = 11/(z+1).
Value of 'y' is root of p2 - 10p + 25 = 0.
Quantity I: Value of 10z.
Quantity II: 100
...Quantity-I: Average number of tablets sold by a company from January to May is 480, while average number of tablets sold by the same company from May t...
Quantity-I: A mixture contains 50% milk and the rest 360 litres water. When (x −15) litres of water and (x+10) litres of milk are added to this mixtu...
What is the larger number?
Quantity I. Difference between the two numbers is 21 and LCM and HCF of those numbers are 70 and 7 respectively.
<...The sum of ages of A, B and C is 65 years.The ratio between age of A, 4 years hence and the present age of B is 5:6.
Quantity I: 414
Qua...
Quantity I: The marked price (MRP) of an item is 30% higher than its cost price (CP). The item was sold after providing a discou...
