A garden roller has diameter 70 cm and length 1 m. What area of lawn does it press in ONE full revolution? (Take π = 22/7.)

Question

Accepted Answer

2.2 sq m. One revolution covers the CSA: 2 × 22/7 × 0.35 × 1 = 2.2 sq m (r = 35 cm = 0.35 m). 1.1 uses the radius in place of 2r, i.e. forgets the 2.

A garden roller has diameter 70 cm and length 1 m. What area of lawn does it press in ONE full revolution? (Take π = $\frac{22}{7} .$ )