Question

SUTURTIVE TER
1. The perimeter of a rectangle is 230 cm. If the length of the rectangle is 70 cm, find its breadth and area.
2. The area of a rectangle is 96 cm. If the breadth of the rectangle is 8 cm, find its length and perimeter.
3. How many tiles whose length and breadth are 13 cm and 7 cm respectively are needed to cover a
rectangular region whose length and breadth are 520 cm and 140 cm?

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Answer 1

Some formulas for rectangle-

Perimeter(p)= 2*(length+breadth)

Area(a)= length*breadth

1.p=2*(l+b)

230=2*(70+b)

b=45

a= l*b

a= 70*45

a= 4150

2.a= l*b

96= l*8

l= 12

p= 2*(l+b)

p= 2*(12+8)

p= 40

3.area of region= 520*140 = 72800

area of one tile= 13*7= 91

number of tiles required to fill the region= area of region/ area of one tile

= 72800/91

= 800