50 square stone slabs of equal size were needed to cover a floor area of 98 sq.m. Find the length of each stone slab?  Choose the correct choice from the following options:
A) 140 cm  B) 767 cm  C) 88 cm  D) 666 cm  E) 776 cm

Rationale: "area of each slab = 98 / 50 m 2 = 1.96 m 2 length of each slab √ 1.96 = 1.4 m = 140 cm"
Answer: A