If a body moves for the first 2 hours with a speed of 20 km/h and another one hour with a speed of 30 km/h, then the total distance travelled by the body is:

60 km

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70 km

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80 km

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90 km

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Solution

The correct option is B
70 km

We know that, Distance $= S p e e d \times T i m e$

The total distance will be the sum of the distances travelled in both the time intervals.

Hence, total distance $= (2 \times 20) + (1 \times 30) = 70 k m$

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If a body moves for the first 2 hours with a speed of 20 km/h and another one hour with a speed of 30 km/h, then the total distance travelled by the body is:

The correct option is B 70 km We know that, Distance =Speed×Time The total distance will be the sum of the distances travelled in both the time intervals. Hence, total distance =(2×20)+(1×30)=70km

The correct option is B
70 km

We know that, Distance $= S p e e d \times T i m e$

The total distance will be the sum of the distances travelled in both the time intervals.

Hence, total distance $= (2 \times 20) + (1 \times 30) = 70 k m$