Question

3y=ax+7 find a
find surface area of the sphere of diameter 21cm
An umbrella made by stitching 10 triangular pieces of cloth of two different colours each piece measuring 20 CM M 50 cm and 50 cm how much cloth of each colour is required for the umbrella
Express 0.47 in p_q form where Q = to zero
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Answer 1

1st)

$3y = ax + 7 \\ 3y - 7 = ax \\ a = \frac{3y - 7}{x}$

2nd one)

surface area of sphere :-

$= 4\pi {r}^{2}$

d = 21cm then r = 10.5 cm

$\\ = 4 \times \frac{22}{7} \times {(10.5)}^{2} \\ = 1386 {cm}^{2}$

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Answer 2

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