Question

1. Find area of a rectangle which has the following dimensio
(a) 18 cm by 10 cm
(b) 25 m by 12 m
2. Find the area of a square whose side length equals
(a) 7 cm
(b) 18 cm
(e 1.5
3. Find in hectares the area of a
(a) rectangular farm measuring 400 m by 275 m.
(b) square farm having one side = 650 m
4. Find the length of a rectangle whose
(a) area = 360 cm² and breadth = 15 cm
(b) area = 4.5 m² and breadth = 1.8 m
5. Find the perimeter of a square whose area is
(a) 49 cm
(b) 100 cm
6. (a) Find the area of a square whose perimeter is 84 cm.​

Answer 1

Area of the rectangle with given measurements :

l = 18 cm & b = 10 cm

Area of the rectangle = l×b = 18cm×10cm = 180 cm²

l = 25 cm & b = 12 cm

Area of the rectangle = l×b = 25cm×12cm = 300cm²

Area of square :

Side = 7 cm

Area of the square = (side)² = (7cm)² = 49 cm²

Side = 18 cm

Area of the square = (side)² = (18cm)² = 324 cm²

Side = 1.5 cm

Area of the square = (side)² = (1.5 cm)² = 2.25 cm²