D and e are points on face ab and ac respectively of triangle ABC such that area of DBC is equals to area of ABC prove that d e parallel to BC parallel
The cost of 2 kg of apples and 1 kg of grapes on a day was found to be RS 160. After a month, the cost of 4 kg of apples and 2 kg of grapes is RS 300. Represent the situation algebraically and geometrically.
The height of right circular cone is trisected by two planes drawn parallel to the base. Shoe that the volume of the 3 person from the top are in the ratio 1:7:19
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