Question

solve this question mate plzzz ​

Answer 1

Answer:

312

Step-by-step explanation:

no. of plants to be planted by class 1 is 4

i.e. 1(2)(2)=4

Similarly... no. of plants to be planted by

class 2 is 8

class 3 is 12 and so on.

Observing, we get an arithmetic progression: 4,8,12,16.....

S(n)=n/2 * (2a+(n-1)d)

=12/2 * (2(4) + (12-1)4)

Solving...

We get S(n)=312 which is the total number of plants to be planted.

Answer 2

Step by step explanation in Image :