Elitmus Exam Logical Reasoning Cryptography

A boat carry 1800 peoples in 12 hours across the river. It takes 20 minutes to cross river.what is the speed of boat...?
1. Boat can carry 220 person at a time.
2. Boat take rest 20 minutes at both ends.

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Elitmus Other Question
A monkey is 60 m away from banana tree to left side and 40 m away from mango tree to right side.when tail of monkey pulls from left side it moves 20 m to left and if tell pulls from right side then monkey moves 20 m towards right.This process continues till monkey will reach any of tree.
1. Total number of time when tail pulls=21.
2. Right side pulls 3 times more than left side. Find the sum of roots for---sq root of(x+7)=x. sq root of(x+7)??? asked in e litmus 23rd nov 2014 @Bangaluru