A boy's height is increasing at the rate of 2% when compared to that of the previous year. If his present height is 156.06 cm, what was his height two years ago ?

The population of a city increased at the rate of 20% every year for the last three years. If the present population is 203904, then what was the population of the city 3 years ago ?

The population of a city increased by 10% in the previous year. If the present population is 1,32,000, what was the population of the city a year ago?

A tree is growing so that, after t- years its height is increasing at a rate of 18/(sqrtt) cm per year. Assume that when t = 0 the height is 5 cm. (i) Find the height of the tree after 4 years. (ii) After how many years will the height be 149 cm ?

The population of a city increases by 30% every year. If the present population is 338000, then what was the population of the city of two years ago ?

The height of a tree increases every year 1//8 times. If the present height of the tree is 64cm, then what will be its height after 2 yr?

A papaya tree was planted 2 years ago.It grows at the height the rate of 20% every year. If at present,the height of the tree is 540cm, what was it when the tree was planted? 324backslash cm b.400backslash cm c.375backslash cm d.432cm

The radius of a right circular cylinder increases at the rate of 0.2 cm/sec and the height decreases at the rate of 0.1 cm/sec. The rate of change of the volume of the cylinder when the radius is 1 cm and the height is 2 cm is