Question

A student observed 31 Quisqualis plants each with 36 nodes, 15 Hibiscus plants each with 21 nodes and 77 Calotropis plants each with 11 nodes. All these plants contain leaves at every node. What will be the total number of leaves of these three plants put together?

• A. 2593
• B. 1585
• C. 237
• D. 4241

Answer 1

The correct option is D 4241

Quisqualis belongs to family Combretaceae and has opposite phyllotaxy which means two leaves are present at each node. Therefore, 31 Quisqualis plants, each with 36 nodes have 31 $\times$ 36 $\times$ 2= 2232 leaves. Hibiscus plant has alternate phyllotaxy which means one leaf is present at each node. Therefore, 15 Hibiscus plants with 21 nodes will have total = 15 $\times$ 21= 315 leaves. Calotropis exhibit opposite phyllotaxy which means two leaves are present at each node. Therefore, 77 Calotropis plants each with 11 nodes will have 77 $\times$ 11 $\times$ 2= 1694 leaves. This makes total 2232 +315 + 1694= 4241 leaves.
Therefore, the correct answer is option D.