Question Answers

An express train takes 1 hour less than passenger train to travel 132 km between Mysore and Bangalore (without taking into consideration the time they stop at intermediate stations). If the average speed of the express train is 11 km/hour more than that of passenger train, find the average speed of the two trains. Find [...]

In the previous problem, if theta is the angle substended by the sun at the planet, then temperature at which planet radiates energy is proportional to if theta is the angle substended by the sun at the planet In the previous problem then temperature at which planet radiates energy is proportional to October 4, 2020 [...]

Two water taps together can fill a tank in 9 8/3​ hours. The tap of larger diameter takes 10 hours less than the smaller one to fill the tank separately. Find the time(in hrs.) in which tap of smaller diameter can separately fill the tank. Find the roots of the following equations : x − [...]

A train travels 360 km at a uniform speed. If the speed had been 5 km/hr more, it would have taken 1 hour less for the same journey. Find the speed of the train. A train travels 360 km at a uniform speed. If the speed had been 5 km/hr more it would have taken [...]

The surface temperature of the sun is T0 and it is at average distance d from a planet. The radius of the sun is R. The temperature at which planet radiates the energy is The surface temperature of the sun is T0 and it is at average distance d from a planet. The radius of [...]

The difference of squares of two numbers is 180. The square of the smaller number is 8 times the larger number. Find the two numbers. The difference of squares of two numbers is 180. The square of the smaller number is 8 times the larger number. Find the two numbers. October 4, 2020 Category: Chapter [...]

The total energy of a blackbody radiation source is collected for one minute and used to heat water The temperature of the water in creases from 20∘C to 20.5∘C If the absolute temperature of the blackbody is diubled and the experiment repeated which of the following statements would be most nearly COR−RECT ? . but [...]

The diagonal of a rectangular field is 60 metres more than the shorter side. If the longer side is 30 metres more than the shorter side, find the sides of the field. find the sides of the field. The diagonal of a rectangular field is 60 metres more than the shorter side. If the longer [...]

In a class test, the sum of Shefali’s marks in Mathematics and English is 30. Had she got 2 marks more in Mathematics and 3 marks less in English, the product of their marks would have been 210. Find her marks in the two subjects. In a class test the product of their marks would [...]

The sum of the reciprocals of Rehman’s ages, (in years) 3 years ago and 5 years from now is 1/3 . Find his present age. (in years) 3 years ago and 5 years from now is 1/3 . Find his present age. The sum of the reciprocals of Rehman's ages October 4, 2020 Category: Chapter [...]