EM-2270
Arc length and sector area
E Math · Secondary 4 · Medium · Arc length and sector area
The cross-section of a tunnel is a semicircle of radius 4 m. During heavy rain, water rises to a depth of 1 m from the bottom of the tunnel.
Find the angle, in radians, subtended at the centre by the water surface at the bottom of the tunnel.
Find the angle, in radians, subtended at the centre by the water surface at the bottom of the tunnel.
- rad
- rad
- rad
- rad
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