Question

the length and the breadth of a field are in the ratio 3 ratio 2 the cost of levelling and turfing the field at the rate of rupees 1.25 per square metre is rupees 1470 find the cost of surrounding the field with a friends at the rate of rupees 2.50 per metre​

Answer 1

Answer:

Step-by-step explanation:

Let common multiple be a

Area of field = 3a X 2a

=6a square

6a square X 1.25 = 1470

a square = 1470/6 x 1.25

a square = 196

a = 14

Lenght of field = 14*3 = 42

Breath of field = 14*2 = 28

Perimeter of field = 2(l+b)

2(42+28)= 2*70=140

140*2.50= 350/-

Answer 2

Step-by-step explanation:

area of the field = (1470×1.25) = 1837.5 m²

Let the common factor be x

therefore, length = 3x and breadth = 2x

now, 3x × 2x = 1837.5

》6x² = 1837.5

》x² = 1837.5 ÷ 6

》x² = 306.25

》x = 17.5

therefore, length = 3 × 17.5 = 52.5 m

breadth = 2 × 17.5 = 35 m

therefore, perimeter of the field = 2(52.5+35)m

= 175 m

so cost of putting fences = Rs.( 175×2.5)= Rs. 437.5

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