Question

2. A rectangular field costs Rs. 110 for levelling at 50 paise
per square metre. If the ratio of length: breadth is 11:5.
Find the length of the field :
(a) 16 m
(b) 21 m
(c) 22 m
(d) none of these​

Answer 1

Answer:

c) 22

Step-by-step explanation:

total area is 220 m²

the ratio will be 11x:5x

area=l×b

220 =11x×5x

55x²=220

x=2

Answer 2

Given:-

length: breadth=11:5

let, length nd breadth ratio be x

Area of rectangular field= total cost/ cost per square m

=>110/(50/100) { convert Paisa into rupee}

=>(110*100)/50

=>220m²

so, we find area of rectangular field=220m².

now,

we know area of rectangle:-

length* breadth = area

so,

11x*5x= 220

55x²=220

x²=220/55

x²=4

or,

x=2

therefore,

length=>11x=11*2=22m

breadth=>5x=5*2=10m

Hence, length of the field=22m

good luck