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Inner radius of the ball= (12-8) =4cm Required volume= 4 π/3 (12 ³ -4³) =4 π/3(1728-64) = = 4 π/3 ×1664=2218.6π
In the year 2014, the population of a village P was 20% more than the population of village R.In the year 2015, after increasing by 40%, total populatio...
The price of kerosene increases by 20% and then by a further (20/3) % . Find the percentage by which the consumption of kerosene must be reduced so tha...
A company has 1200 employees, with 45% working in operations, 35% in sales, and the rest in HR. During an appraisal cycle, 20% of the operations employe...
A student multiplied a number by 2/5 instead of 5/2 . What is the percentage error in the calculation?
In a train, 40% of the passengers are females. Out of total number of passengers, 60% have unreserved tickets out of which 20% are females. How much per...
Suyash have total amount of Rs.3000 out of which, he spent 25% on food, 40% of the rest on travelling. Out of remaining amount he spends Rs.620 on misce...
Out of the total population in a village 25% casted invalid votes and the winning candidate A received 14(2/7)% more votes than the losing candidate B....
Gaurav spends 25% of his salary on grocery and 35% of the remaining amount on electricity bills. If Gaurav saves Rs. 33637.5, what is his total salary?
In a school, 60% of the students pass and 30 fail. The number of students appearing from another school is 25 more and 20 more students pass than the f...
In a village election between two candidates, the winner secured 54% of the total votes cast and won by a majority of 4000 votes. How many votes did the...
