Question

find the area covered by minute hand of length 30cm of a clock in 10 min?

Answer 1

Area covered by minute hand =area of sector
Given radius=30cm
Total no. of sections =12
So, each section covers=360°/12=30°
In 10 min it covers 2 sections = 2×30°=60°
So,angle of sector = 60°
Area of sector=(60°/360°)× 3.14×30×30=471 square cm