Question
A 60-litre mixture of acid and water contains 33(1/2%)
acid. How much water (in litres) must be added to get a mixture having 25% acid?Solution
In 60 liters solution 34 liter acid and 66 liter water In 60 liters solution, water is (66/100) × 60 = 6.6 x 6 = 39.6 or ~ 40 liter On adding x liters of water [(40 + x)/(60 + x)] x 100 = 75 On dividing 100 and 75 we get 4 and 3 value then [(40 + x)/(60 + x)] x 4 = 3 (160 + 4x)/(60 + x ) = 3 160 + 4x = (60 + x) x 3 160 + 4x = 180 + 3x 4x - 3x = 180 - 160 x = 20 Liter
What will be the output of the code
int main(){
int x= 10;
int y=10;
int s=-(-x-y)
cout<
return 0;
}
In a virtual memory system, what is a "page fault"?
Which type of transistor is less susceptible to thermal runaway?
What is the unit of electric current?
Which transport layer protocol provides connection-oriented, reliable, and ordered delivery of data packets between applications?
The result of SQL select statement is?
What is an ER diagram used for?
Which routing protocol is commonly used within an autonomous system (AS) to determine the best path for data packets?
Which distribution is used to model the number of successful outcomes in a fixed number of independent Bernoulli trials?
Which component in the MVC architecture communicates directly with the database?
