Let the original side be x.

The side of new square =

=

Area of new square =

Percentage fall in area =

= 64%

Ans : C

In one hour Eric cleans of the room.

In one hour Clayton cleans of the room.

In one hour Eric and Clayton clean =

Time taken to complete entire work = 3 1/3 hours.

**Ans : B**

Average speed when taken for the whole

journey =

where x is the speed during the first part and y is the speed during the second part of the journey

**Ans : A**