What will be the change in the volume of a rectangular solid by increasing its length by 10 percent and decreasing its width by 10 percent?

A dozen pairs of socks quoted at 180 are available at a discount of 20 %. How many pairs of socks can be bought for 48? 

If of 75 % of one-eighth of a certain number is 179, then of three – fourth of that number is:

A student scored 32 percent and failed by 8 Marks. If he had scored 36 percent marks, he would have passed by 2 marks. What is the passing score?

If the cost price of 15 tables is equal to the selling price of 20 tables. The loss percent is:

A book seller allowed 10 % discount on printed price. He gets 30 % commission from publisher. His profit in percent will be? 

Hari and Mohan contested a panchayat election. Hari got 52 percent votes and defeated Mohan by a margin of 90 votes. What was the total turnout in the election.

Mr. Ankit invests 14% of his monthly income every month i.e. Rs.1,750 in shares, 8% in Insurance policies and 7% in fixed deposits. What is the total annual amount invested by him?