5. A 8 m wide lane was paved with bricks of size 20 cm by 15 cm. If the rate of brick
was ₹.1350 per thousand and bricks worth ₹.60750 were used for pavements, find
the length of the lane.
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Given : A 8 m wide lane was paved with bricks of size 20 cm by 15 cm. the rate of brick was ₹.1350 per thousand and bricks worth ₹.60750 were used for pavements,
To find : the length of the lane.
Solution:
Let say length of lane = L m
the length in cm = 100L cm
width = 8m = 800 cm
Area = 100L * 80 = 8000L cm²
Area of a brick = 20 x 15 = 300 cm²
Number of bricks required = 8000L/300 = 80L/3
Rate of brick per thousand = 1350
Rate of 1 brick = 1350/1000 = 135/1000
Rate of 80L/3 bricks = (80L/3) * (135/1000) = (8L) * 45 / 100
= 360L
360L = 60750
=> L = 168.75 m
length of the lane = 168.75 m
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https://brainly.in/question/7990732
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