The height of three plants A,B and C in a garden are in the ratio 2:3:5 their mean height is 30cm (i) find the height of plant B. (ii) if another plant D is added to the garden such that the mean height of the four plants is now 33cm, find the height of plant D.
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ans (i) 20
We multiply the height of A and B our ans is 10 cm then we subtract the height 30 -10 is 20 cm
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