Question

On Earth Day, Rahul and his classmates planned to organize a tree plantation event in the
school grounds. The length and breadth of the ground are 80 m and 50 m respectively. The trees
are to be planted in an area of 10m×10m. If one row of trees takes up an area of 4 m2, then how
many such rows can be planted? Also calculate the total area of the ground and the area left after
planting the trees. What values/qualities of Rahul and his classmates would you inculcate in your character?

Answer 1

Q.1. If one row of trees takes up an area of 4 m2, then how many such rows can be planted? 

Solution:

Total Area used for tree plantation = 10 m × 10 m
                                                           = 100 m²

One tree row takes area = 4 m²
∴ No. of tree rows that can be planted = 100 / 4 m²
                                                                       =  25 m²    (ans.)

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Q.2. Calculate the total area of the ground and the area left after
planting the trees.

Solution:

given, length (of ground) = 80 m
           breadth  = 50 m

∴ Total area of ground = 80 m × 50 m
                                           = 4000 m²    (ans.)

Area used for tree plantation = 100 m²
∴ Area left after tree planted = 4000 - 100 m²
                                                     = 3900 m²    (ans.)

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