In what ratio sugar at Rs 30/kg should be mixed with sugar at Rs 45/kg so that on selling the mixture at Rs 42/kg there is a profit of 20%?

If two successive discounts of 20% and 30% are given, then what is the net discount (in %)?

A solid cone of height 24 cm and radius of its base 8 cm is melted to form a solid cylinder of radius 6 cm and height 6 cm. In the whole process what
percent of material is wasted?

Sandy and Mandy do (8/13)th part of a work and the rest of the work was completed by Andy. If Sandy, Mandy and Andy take the same work for Rs. 2600, then what is the share (in Rs) of Andy?

How many times the keys of a typewriter have to be pressed in order to write numbers from 121 to 1346?

With which of the following country, India has a land dispute near Tawang?

Due to incresed weapon launching missions of North Korea, which country has launched a spy satellite to monitor it?

'The World Outside My Window' is written by which author?