Read the passage carefully and answer the following questions.
A dancer is demonstrating dance steps along a straight line. The position-time graph of the dancer is given here.
The average speed for the dance step depicted by CD is
A 1 m s-1
B 1.33 m s-1
C 2.75 m s-1
D 0.89 m s-1
A few healthy gram seeds are placed in each of the three pots X, Y and Z containing same type of soil. The soil in pot X is mixed with some green leaves. The soil in pot Y is mixed with old cow dung while soil of pot Z is mixed with urea. Pots are watered regularly and given proper environment for plant-growth. Which of the following will be observed after 10 days?
A Lot of growth in Z with replenishment of all the nutrients.
B Lot of growth in X without replenishment of any nutrient.
C Lot of growth in Y with replenishment of the nutrients.
D Both (A) and (C)