Question

I bought a pack of 100 rectangular index cards. Each card measured 15 cm by 10 cm. The pack said: paper density=200gsm (grams per square metre). This means that a square metre of these cards weighs 200 g.

All the cards in the pack are placed flat on a table without overlap. In square metres, what is the total area of the table covered by the cards?

Answer 1

15,000cm^2

Explanation:

Given data

Dimension of a card

Length= 15cm

Widht= 10cm

Area= 15*10= 150cm^2

Now if 1 card covers area of 150cm^2

the 100 cards will cover x

cross multiply

x= 150*100

x= 15,000cm^2

Hence the total area covered is 15,000cm^2