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Sukriti Korpal
Asked: 2022-11-04T05:36:18+05:30 In:

The minute hand of a watch is 1.5 cm long. How far does its tip move in 40 minute.

The minute hand of a watch is 1.5 cm long. How far does its tip move in 40 minute.
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  1. 6.28 cm

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Rajesh Kumar Reddy
Asked: 2022-11-01T10:50:41+05:30 In:

The minute hand of a watch is 1.5 cm long. How far does its tip move in 40 minutes? (Use π = 3.14).

The minute hand of a watch is 1.5 cm long. How far does its tip move in 40 minutes? (Use π = 3.14).
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  1. Solution: In 60 minutes, the minute hand of a watch completes one revolution. Therefore,
    in 40 minutes, the minute hand turns through 2/3 of a revolution. Therefore,
    θ = 2 × 360°/3
    or 4π/3
    radian. Hence, the required distance travelled is given by
    l = r θ = 1.5 × 4π/3 cm = 2π cm = 2 × 3.14 cm = 6.28 cm.

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