2026 Re-NEET Plant Growth and DevelopmentArithmetic growth Easy Question 5 of 85 in Plant Growth and Development

Length of the stem at time 0 is 20 cm. The arithmetic growth rate is 30 cm per day. What is the length of the stem at the end of the 7th day?

A 50 cm
B 170 cm
C 230 cm
D 460 cm

The answer is C.

Solution

Reference: NCERT Class XI, page 170. For arithmetic growth, $L_t=L_0+rt$ with $L_0=20$ cm, r = 30 cm/day and t = 7 days: $L_t=20+30\times7=230$ cm.

Concept Arithmetic growth

Plant Growth and Development in past papers

85 questions from this chapter have appeared across 24 exam years.