Q1. The least number of square tiles required to pave the floor of a room 15 m 91 cm and 9 m 46 cm broad is
A. 814
B. 820
C. 840
D. 844
EXPLANATION
Answer: A
Explanation:
Let the number of square tiles be n and the area of each square tile be
Length = 1591 cm
Breadth = 946 cm
x is the H.C.F of 1591 and 946
1591= 43 × 37
946= 43 × 2 × 11
x = 43
n(43)(43) = (1591)(946)
n = 37*22 = 814
The answer is option A
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