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The area of a trapezium is 138 m2. The distance and the differelengths of the parallel sides are 12 m and 7 m respectively. Find the length of the parallel sides. |
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Answer» Area of trapezium=138m^2height=12difference between sides =7now,area of trapezium. = 1/2×(a+b)×h1/2×(a+b)×12 = 138(a+b)=138/6(a+b)=23difference=7, =a-b =7now adding the sum and difference (a+b)+(a-b)=23+72a=30a=15so, b=8 :(a-b)=15-8=7. |
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