The pollution in a normal atmosphere is less than `0.01%`. Due to leakage of a gas from a factory, the pollution is increased to 20%. If every day 80% of pollution is neutralised, in how many days the atmosphere will be normal?

If the length of the seconds pendulum is increases by 4%, how many seconds it will lose per day?

If the population of a town increased every year by 2.1% of the population at the beginning of that year,in how many years will the total increase of population be 20%

A is 20% more efficient than B.B can do a piece of work in 20 days. In how many days can A do the same work?

A contractor employed 30 men to complete the project in 100 days. But later on he realised that just after 25 days only 20% of the If the amount of work is also increased by 20% of the actual work, then how many extra days are required (m comparison with scheduled time) but the number of men remained constant