Question

6. A person walks at 4 km/h. How long will he take to walk 7 times around a circular park,
the area of which being 616m2 ?
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Answer 1

Solution:

Circumference (C) = 2πr

Area = πr²

» Circumference = 2√(πA)

= 2√(1936)

= 2 × 44

= 88 m

Therefore, total distance = 88 × 7 = 616 m

Time = Distance/Speed

» Time = 0.616/4 = 0.154 hr = 9.24 minutes