What is the least number of squares tiles required to pave the floor of a room 1

Question

What is the least number of squares tiles required to pave the floor of a room 15 m 17 cm long and 9 m 2 cm broad?

Options:

A . 814

B . 844

C . 820

D . 840

Answer: Option A

Length of largest tile = H.C.F. of 1517 cm and 902 cm = 41 cm. Area of each tile = (41 x 41) cm2. ∴ Required number of tiles = ❨ 1517 x 902 ❩ = 814

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