Question

A large rectangular card measures 80 centimetres by 90 centimetres.

Maria uses all this card to make small rectangular cards measuring 40 millimetres
by 15 millimetres.
Calculate the number of small cards.

Answer 1

For bigger rectangle:-

• L=90cm
• B=80cm

Area:-

• LB
• 90(80)
• 7200cm²
• 720000mm²

For smaller rectangle

• L=40mm
• B=15mm

Area:-

• LB
• 40(15)
• 600mm²

Total cards:-

• 720000/600
• 1200cards

Answer 2

1200 cards

All measurements should be taken in centimeters

Calculate the area of large rectangular card:

• Length * Width

• 80 * 90

• 7200 cm²

Calculate the area of each small cards:

• Length * Width

• 4 * 1.5

• 6 cm²

Divide the area of large card by area of small card

• 7200 cm² ÷ 6 cm²

• 1200

Number of small cards: 1200 cards