Arithmetic Questions And Answers :: Area: part3

6.A rectangle has 15 cm as its length and 150 cm2 as its area. Its area is increased to 1 times the orginial area by increasing only its length. Its new perimetrer is:

7.The cost of cultivating a square field at the rate of Rs. 160 per hectare is Rs. 1440. The cost of putting a fence around it at 75 paise per metre is:

8.A rectangular plot is half as long again as it is broad. The area of the lawn is (2/3) hectares. The length of the plot is:

9.The length of a rectangle is increased by 60%. By what per cent would the width have to be decreased to maintain the same area?

10.The cost of carpeting a room 15 metres long with a carpet 75 cm wide at 30 paise per metre is Rs. 36. The breadth of the room is: