Mensuration Mcqs

Q.  The length of a rectangular floor is more than its breadth by 200%. If Rs. 324 is required to paint the floor at the rate of Rs. 3 per sq m, then what would be the length of the floor?

a. 27 m
b. 24 m
c. 18 m
d. 21 m


ANSWER: See Answer
 
Let the length and the breadth of the floor be l m and b m respectively.

l = b + 200% of b = l + 2b = 3b
Area of the floor = 324/3 = 108 sq m
l b = 108 i.e., l * l/3 = 108
l2 = 324 => l = 18.
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