Theory:

     "Why don't we all jump on him together till he yells for mercy?" exclaimed Mr. Geography, rubbing his hands in anticipation.
 
     This appealed to all of them and even Justice Mathematics got up from his chair to join the gang! Menacingly they all advanced towards Mahesh, who looked around frantically for somewhere to run to, somewhere to hide... Nothing! There was no place to run to! The mob was almost upon him when a soft voice rose above the frightening silence.
Explanation:
 
Mr. Geography had given an idea on his part. He suggested the crowd to jump on Mahesh together till he gives out loud cries. Having given a suggestion, he made himself ready to execute it by rubbing his hands.
 
Mr. Geography's idea seemed satisfactory to everyone. This plan looked acceptable to Justice Mathematics also. So, he got up from his chair to join the gang. The gang approached Mahesh in a most threatening way. Mahesh had no clue what can he do or where can he go to escape from the dangerous situation.
 
everyone angry on Mahesh.jpg
Everyone angry on Mahesh
 
Unfortunately, there was no place to run. The scary crowd were almost near Mahesh to punish him. Just then, they heard a soft voice in that frightened silence before they touch him.
 
Meaning of difficult words:
 
S.No
Words
Meaning
1.
Yell
A sudden loud cry
2.
Anticipation
A feeling of excitement about something that is going to happen in future
3.
Appeal
Attractive or interesting to someone
4.
Menace
Something that is likely to harm
5.
Frantically In a hurried and excited or confused way
6.
Mob A disorganised crowd
7.
ThreatenLikely to cause harm or damage
Reference:
State Council of Educational Research and Training (2019). Term-3 English Standard-6. BROUGHT TO BOOK: Madhumita Gupta (pp. 109-112). Published by the Tamil Nadu Textbook and Educational Services Corporation.