Question

A man goes 10m towards North, then 20m towards east then displacement is

• A. 22.5m
• B. 25m
• C. 25.5m
• D. 30m

Answer 1

Answer: (A)

22.5m

Answer 2

If we take east as $x -$axis and north as $y -$axis, then

displacement $= 20\widehat{i} ⥂ + 10\widehat{j}$

So, magnitude of displacement $= \sqrt{20^{2} + 10^{2}} = 10\sqrt{5}$

= 22.5 m.