Telangana Board Solutions for Chapter: Perimeter and Area, Exercise 9: Exercise 9

Rahul owns a rectangular field of length $400 \mathrm{m}$and breadth $200 \mathrm{m}$. His friend Ramu owns a square field of length $300 \mathrm{m}$. Find the cost of fencing the two fields at $₹150$ per meter. If one tree can be planted in an area of $10 \mathrm{sq} \mathrm{m}$, who can plant more trees in his field? How many more trees can he plant?

The length of a rectangular floor is $20 \mathrm{m}$, more than its breadth. If the perimeter of the floor is $280 \mathrm{m}$, what is its length?

A rectangular plot of land is $240 \mathrm{m}$ by $200 \mathrm{m}$. The cost of fencing per meter is $₹30$. What is the cost of fencing the entire field?

The side of a square field is $120 \mathrm{m}$. The cost of preparing a grass lawn is $₹35$ per square meter. How much will it cost, if the entire field is converted into a lawn?

What will happen to the area of rectangle, if Its length and breadth are doubled?

What will happen to the area of the rectangle, if Its length is doubled and breadth is tripled? 

What will happen to the area of a square if its side is doubled?

What will happen to the area of a square if its side is halved?