Make b the subject of the relation lb = 1/2 (a + b)h

Correct Answer is : ah2l−hah/2l - h2l−hah

Correct Answer is : ah2l−hah/2l - h2l−hah

Test Index

WAEC Mathematics 2019 Paper

Question : 26

Total: 50

\frac{1}{2}

(a + b)h

Solution:

$lb = \frac{1}{2} (a + b)h$ 2lb = ah + bh

2lb - bh = ah

$\frac{b(2l - h)}{2l - h} = \frac{ah}{2l - h}$

b = $\frac{ah}{2l - h}$

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