Solution: ⇒ 24 18 - x - 24 18 + x = 1 ⇒ 24 ( 2 x ) ( 18 - x ) ( 18 + x ) = 1 ⇒ 48x = 324 - x2 ⇒ x2 + 48x - 324 = 0 ⇒ x2 + 54x - 6x - 324 = 0 ⇒ x(x + 54) - 6(x + 54) = 0 ⇒ (x + 54) ( x - 6) = 0 ⇒ x = - 54 or x = 6 ∴ x = 6 (Speed of the stream cannot be negative) Thus, the speed of stream is 6 km/hr. Share with your friends Share 0 Brijendra Pal answered this Hi, Refer the similar link:https://www.meritnation.com/ask-answer/question/in-this-question-how-many-terms-of-an-ap-9-17-25/arithmetic-progressions/12542953 0 View Full Answer