Question

n/2 - 3n/4 +5n/6 = 25 ( find n)​

Answer 1

$\frac{n}{2} - \frac{3n}{4} + \frac{5n}{6} = 25$

$\frac{4n -6n }{8} + \frac{5n}{6} = 25$

$\frac{24n - 36n + 40n}{48} = 25$

$28n = 48 \times 25$

$n = \frac{300}{7}$

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Answer 2

Step-by-step explanation:

Perimeter of trapezium = 104 m

Length of Non-parallel sides = 18 m and 22 m

Altitude = 16m

Area of Trapezium = 0.5 * (sum of parallel sides)*altitude ------ (1)

Sum of parallel sides = Perimeter - (sum of non-parallel sides) = 104 m - (18+22)m = 104-40 m = 64 m

From (1), Area of Trapezium = 0.5*64*16 = 512 m^2

Ans: Area of trapezium = 512 m^2