A rectangular room is 10 meter long and 8 meter wide . If one packing case requires 20 Cm* 40 Cm of space . Find the number of cases that can be exactly laid out on floor
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length = 10 m = 10×100 = 1000 cm
breadth = 8m = 8×100= 800 cm
area of room = 1000 × 800 = 800000 sq cm
area of case = 20 × 40 = 800 sq cm
no. of cases = area of room÷ area of case
= 800000÷ 800 = 1000
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