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  1. The length of a road is one kilometre. The number of plants required for plantation at a gap of 20 metres in both sides of the road is
    1. 102
    2. 100
    3. 51
    4. 50
Correct Option: B

Length of the road = 1000 metre
Number of plants on one side of the road

=
1000
 + 1 = 51
20

∴  Total number of plants
= 2 × 51 = 102


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