A car has two windscreen wipers whose swept regions do not overlap. Each wiper has a blade 21 cm long, fixed at the pivot, and it turns through an angle of 120°. Find the total area cleaned by the two wipers in cm². Take π = 22/7.

Question

Accepted Answer

924. One wiper sweeps a sector of radius 21 cm and angle 120°: area = (120/360) × (22/7) × 441 = (1/3) × 1386 = 462 cm². Two wipers clean 2 × 462 = 924 cm².

A car has two windscreen wipers whose swept regions do not overlap. Each wiper has a blade 21 cm long, fixed at the pivot, and it turns through an angle of 120°. Find the total area cleaned by the two wipers in $cm^{2}$ . Take π = 22/7.

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More Areas & Volumes practice

A car has two windscreen wipers whose swept regions do not overlap. Each wiper has a blade 21 cm long, fixed at the pivot, and it turns through an angle of 120°. Find the total area cleaned by the two wipers in cm2. Take π = 22/7.

Step-by-Step Solution

Master this topic in 30 minutes a day.

More Areas & Volumes practice

A car has two windscreen wipers whose swept regions do not overlap. Each wiper has a blade 21 cm long, fixed at the pivot, and it turns through an angle of 120°. Find the total area cleaned by the two wipers in $cm^{2}$ . Take π = 22/7.