An object is travelling from A to B along the given path. The distance from A to C = 50 meters, the distance from C to D was travelled in 2 seconds at 20 m/s and E to B was travelled in 3 seconds at 36 km/hr. Distance from D to E = 70 meters. The object took 20 seconds to cover the entire distance. Select the correct statement(s).

Distance covered is 200 meters.

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Distance covered is 190 meters.

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Speed is 9.5 m/s

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Speed is 10 m/s

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Solution

The correct options are
B
Distance covered is 190 meters.

C
Speed is 9.5 m/s

Total distance $= 50 m (A t o C) + 20 \times 2 (C t o D) + 70 m (D t o E) + 36 \times \frac{5}{18} \times 3 (B t o E)$
$= 50 + 40 + 70 + 30$
$= 190 m e t e r s$
$Speed = \frac{Total Distance}{Total Time} = \frac{190 m}{20 s} = 9.5 m / s$

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The correct options are B Distance covered is 190 meters. C Speed is 9.5 m/s Total distance =50 m (A to C)+20×2(C toD)+70 m(D to E)+36×518×3(B to E) =50+40+70+30 =190 meters Speed=Total DistanceTotal Time=190 m20 s=9.5m/s