Two circular pancakes are cooked on a griddle. The smaller has radius 7 cm and the larger has radius 21 cm. How much greater is the area of the larger pancake? (Take π = 22/7)

Question

Accepted Answer

1232 cm^2. Small = 22/7*7*7 = 154 cm^2. Large = 22/7*21*21 = 1386 cm^2. Difference = 1386 - 154 = 1232 cm^2.

Two circular pancakes are cooked on a griddle.
The smaller has radius 7 cm and the larger has radius 21 cm.
How much greater is the area of the larger pancake? (Take π = $\frac{22}{7}$ )

Step-by-Step Solution

Master this chapter in 30 minutes a day.

More Class 7 Area of a Circle practice

Two circular pancakes are cooked on a griddle.The smaller has radius 7 cm and the larger has radius 21 cm.How much greater is the area of the larger pancake? (Take π = 722​)

Step-by-Step Solution

Master this chapter in 30 minutes a day.

More Class 7 Area of a Circle practice

Two circular pancakes are cooked on a griddle.
The smaller has radius 7 cm and the larger has radius 21 cm.
How much greater is the area of the larger pancake? (Take π = $\frac{22}{7}$ )