The distance (in km) travelled in h hours at a constant speed of 40 km per hour is

40h km

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40 + h km

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20 h km

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40 - h km

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Solution

The correct option is D 40h km
Given speed is 40 km per hour.
In one hour distance travelled is 40 $\times$ 1 = 40 km.
Similarly, distance travelled in two hours is 40 $\times$ 2 = 80 km.
So, the distance travelled in "h" hours is 40 $\times$ h = 40h km.

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The distance (in km) travelled in h hours at a constant speed of 40 km per hour is

The correct option is D 40h kmGiven speed is 40 km per hour. In one hour distance travelled is 40×1 = 40 km. Similarly, distance travelled in two hours is 40×2 = 80 km. So, the distance travelled in "h" hours is 40×h = 40h km.

The correct option is D 40h km
Given speed is 40 km per hour.
In one hour distance travelled is 40 $\times$ 1 = 40 km.
Similarly, distance travelled in two hours is 40 $\times$ 2 = 80 km.
So, the distance travelled in "h" hours is 40 $\times$ h = 40h km.