Q. 463.7( 3 Votes )

# How many square slabs each with side 90cm are needed to cover a floor of area 81sqm.

Answer :

Given:

Side = 90 cm

Area of square lab = 90 × 90

= 8100 sq.cm

Area of slab = 81sq.m = 81 × 10000 = 810000 sq.cm

Number of slabs = 810000 / 8100

= 100

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