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A triangular park ABC has sides 120m, 80...

A triangular park ABC has sides 120m, 80m and 50m. A gardener Dhania has to put a fence all around it and also plant grass inside. How much area does she need to plant? Find the cost of fencing it with barbed wire at the rate of Rs 20 per metre l

A

(i) Rs 12250, (ii) `374sqrt(15)m^(2)`

B

(i) Rs 12250, (ii) `375sqrt(15)m^(2)`

C

(i) Rs 12240, (ii) `375sqrt(15)m^(2)`

D

(i) Rs 12240, (ii) `374sqrt(15)m^(2)`

Text Solution

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The correct Answer is:
B
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A triangular pack ABC HAS SIDES 120m,80m and 50m .(See in Figure).A gardener Dhania has to put a fence all around it and also plant grass inside.How much area does she it with barbed wind the cost of Rs. fencing it with barbed wire at the rate of Rs.20 per metre leaving a space 3m wide for a gate on one side.

Find the cost of fencing a square park of side 300m at the rate of Rs.20 per metre.

Knowledge Check

  • The area of a square field isd 1444m^(2) . Find the cost of fencing the field at the rate of Rs. 5 per metre.

    A
    `Rs. 760`
    B
    `Rs. 720`
    C
    `Rs. 680`
    D
    `Rs. 640`

  • Find the cost of fencing a rectangular park of length 150 m and breadth 50 m at the rate of Rs 10 per metre.

    A
    Rs 3000
    B
    Rs 4000
    C
    Rs 3500
    D
    Rs 2500

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