bas ye kaam karlo... Milega 80% Results #shorts

A fraction in reduced form is such that when it is squared and then its numerator is increased by 25% and the denominator is reduced to 80% it results in 5/8 of the original fraction. The product of the numerator and denominator is

In a second order reaction, 20% of a substance is dissociated in 40 min . The time taken by 80% of its dissociation is

An electric motor operates with an efficiency of 90% . A pump operated by the motor has an efficiency of 80% . The overall efficiency of the system is

Two numbers A and B are respectively 80% and 50% more than the third number C. What is the ratio of A and B?

Assuming each salt to be 80% dissociated , which of the following aqueous solution will have lowest vapour pressure ?

If C.P of an article is 80% of its SP then find the profit