15 cm, of a square area with long arms What is the height of a triangle if the area, equal to the area of a 15 cm, grounded triangle?
(A) 25 cm.
(B) 30 cm.
(C) 28 cm.
(D) 32 cm.
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On immersing iron nail in solution we will notice change in colour from BLUE to GREEN and a BROWN deposit would be seen on the iron nails. It is because the iron ions slowly displaces the copper ions form its solution due to its high reactivity
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