Hello,
Q. Rectangular Floors X and Y have equal area. If floor X is 12 feet by 18 feet and Floor Y is 9 feet wide, What is the length of Floor Y, in feet?
Options:
A. 13.5 B. 18 C. 18.75 D. 21 E. 24
(you guys are thinking, what a 'F' problem
)
Let's check my method. we will solve it with options.
Ans. Area of Floor X = Area of Floor Y
means Length*Width of X = Length*Width of Y
See carefully, Area of Floor X is Integer and 6 is the unit digit. Am i right?
Option A and C eliminated because Answer will be in decimals. Remain with B,D and E
Option B has unit digit of 2 and Option D has unit digit of 9 So These are also eliminated.
So Option E is the answer. Now you can check it with your method.
(12*18 = 9*24)
Er. Ankur Garg
Q. Rectangular Floors X and Y have equal area. If floor X is 12 feet by 18 feet and Floor Y is 9 feet wide, What is the length of Floor Y, in feet?
Options:
A. 13.5 B. 18 C. 18.75 D. 21 E. 24
(you guys are thinking, what a 'F' problem
)Let's check my method. we will solve it with options.
Ans. Area of Floor X = Area of Floor Y
means Length*Width of X = Length*Width of Y
See carefully, Area of Floor X is Integer and 6 is the unit digit. Am i right?
Option A and C eliminated because Answer will be in decimals. Remain with B,D and E
Option B has unit digit of 2 and Option D has unit digit of 9 So These are also eliminated.
So Option E is the answer. Now you can check it with your method.
(12*18 = 9*24)
Er. Ankur Garg
12X18=9x ?
ReplyDelete12 x 9 x 2 =9 x ?
=> x=24 much simpler than finding out unit's digit