Mr. David drove from his home to his work place. For the first 1.2 hours, he travelled at a constant speed of 65 km/h. For the next 2.3 hours, he travelled at a constant speed of 70 km/h. What was the average speed for the whole journey? km/h

explanation:

venn diagram is pictorial representation with of circles showing the relation between two finite sets or things. the intersection part of two circles conveys the relation present in between those sets or things.

here in the venn diagram of sand and salt two circles represent sand and salt. but the area falling under the intersection of these circle represents the mixture of sand and salt.

so, in a venn diagram the mixture will be placed in a middle that is in between the intersection of two circles.

answerca air mass;