Correct Answer: Option B

Explanation

Area of triangle ABC = 35cm\(^2\).

Area of triangle ABC = \(\frac{1}{2}\) x B x H

                                 = 0.5 x y x 7 = 35

                                  = 3.5y = 35

                                 y = \(\frac{35}{3.5}\) = 10 cm.

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