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prashant solanki

· started a discussion

· 1 Months ago

needs improvement (Question: 194576.0 )

0 marks out of 10 for solution section sir otherwise question level is good
you need more and more improvement in solution section other online platforms are providing better in this section

Question:
For a plot of land of 100 m × 80 m, the level is to be raised by spreading the earth from a stack of a rectangular base 10 m × 8 m with vertical section being a trapezium of height 2 m. The top of the stack is 8 m × 5 m. By how many centimetres can the level be raised? 
Options:
A) 3 cm 
B) 2.5 cm 
C) 2 cm 
D) 1.5 cm 
Solution:
Ans: (d) 


The volume of trapezium = \(\cfrac{1}{2}\) (10 + 5) × 8 × 2 = 120 m3

The height of rectangular plot rise = \(\cfrac{120}{100 × 80 }\)  = 1.5 cm

Knowledge Expert

· commented

· 1 Months ago

Thanks for the Feedback.

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