20. Figure 31.9 shows the cross section of a swimming pool with dimensions as shown If the length of the pool is 25 m, how much water can it hold?
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hope it helps dear . it's in the picture
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The cross-section of trapezium Area of trapezium = 1/2*height* sum of parallel sides
[1/2*10*(2+4) = 5*6 =30sq. m
volume of tank =Area of cross section *Length
=(30*25)cu. m= 750 cu. m
[ if 1 cu. m= 1000 Litre]
Capacity of tank is 750*1000
i.e 7,50,000 Litre
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