A boy throws a stone vertically in the air with an initial speed of 40m/sec. At the instant the stone is thrown, a monkey at the top of a tree h m high falls freely. How long will it take for the stone to hit the monkey if they meet at a point mid way between the ground and the top of tree?

i think the answer is a and b

i wish you luck

well clustered together.

points close on a scatter diagram

it is given that trillions of microbes make up to 1% to 3% of the body mass.

let's take average of this percentage: 2%

consider the average mass of the human body as 70 kg.

then, trillions of microbes would have mass  

therefore, 100 trillion micro-organisms would weigh:

this is an approximate value and could change depending on the mass of the human body and percentage of the microbes present in it.

average mass per microorganism =