Question

Which of the following area in the given cylinder of radius 7 cm and height 10 cm is equal to 440 <!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> ${cm}^2$ ?

• A. Area 1
• B. Area 2
• C. Area 1 + Area 2
• D. Area 1 - Area 2

Answer 1

The correct option is A Area 1

Area 1 = 2πrh

= 2 × $\frac{22}{7}$ × 7 × 10

= 440 ${cm}^2$

Area 2 = π$r^2$ + π$r^2$

= 2π$r^2$

= 2 × $\frac{22}{7}$ × 7 × 7

= 308 ${cm}^2$

Hence, Area 1 equals 440 ${cm}^2$.