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Question 101

A truck carrying 7.8 m3 concrete arrives at a job site. A platform of width 5 m and height 2 m is being constructed at the site. Find the length of the platform constructed from the amount of concrete on the truck?


Solution

Total volume of concrete=7.8 m3
Width of the platform = 5 m
Height of the platform = 2 m
Let the length of the platform = x m
According to the question,
Volume of concrete = Volume used to make platform
7.8=5×2×x
7.8=10x       [ volume = length × breadth × height ]
10x=7.8x=0.78 m
Hence, the length of the platform is 0.78 m.

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