Question

please tell this Q no. 4 I will mark as brainleist.

Answer 1

hope this answer will help you..

Answer 2

Area of the courtyard = 3750 sq m.

Height of the gravel = 1 cm or 1/100 m = 0.01 m

Now,

Volume = Base area × Height 
= 3750 × 0.01

volume = 37.5 m³

Now, cost of 1 m³ of gravel = Rs. 6.40

Total cost of gravel = 37.5 × 6.40

Total cost of covering the courtyard with gravel of 1 cm height = Rs. 240

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