6. Assertion (A)-Green plants are also called as producer. Reason- (R) Green plants produce their own food with the help of
photosynthesis.
a. Assertion (A) is true but Reason (R) is false
b. Assertion (A) is false but Reason (R) is true
c. Both Assertion (A) and Reason (R) is true
d. Both Assertion (A) and Reason (R) is false​

d

Explanation:

The maximum length of the seesaw is 4 meters

Step-by-step explanation:

Since the seesaw should rise a maximum height of 2 meters and make an angle of 30° with the ground, this situation represents a right-angled triangle with the hypotenuse side the length of the seesaw and the opposite side the maximum height of the seesaw.

Let the length of the seesaw = L, the opposite side = maximum height of the seesaw = 2 m and the angle = 30°.

So by trigonometric ratios,

Sin Ф = opposite/hypotenuse ⇒ Sin30° = 2/L

L = 2/Sin30°

= 2 ÷ 1/2

= 2 × 2 m

= 4 m

So the maximum length of the seesaw is 4 meters.