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The speed ratio of car a and car B is 8:7. Find the speed of car a
A speed = 135 ÷ 1.5 ÷ (8 + 7) × 8 = 48 km / h
The speed ratio of car a and car B is 8:7, so the speed of car a can be calculated
Speed sum: 135 △ 1.5 = 90 (km / h ·)
A's speed: 90x8 / (8 + 7) = 48 (km / h)
Speed of B: 90-48 = 42 (km / h)
Or let B's speed be 7x and a's speed be 8x
135÷1.5=7x+8x
15x=90
x=6
7x = 7 * 6 = 42 (km / h)
A: B's speed is 42 km / h
Two cars a and B leave from two places 135 kilometers apart at the same time. After two minutes of meeting, it is known that the speed ratio of a and B is 5:4
What's the speed of car a?
Speed sum: 135 △ 3 / 2 = 90 (km / h ·)
Speed of a: 90x5 / (4 + 5) = 50 (km / h)
Speed of B: 90-50 = 40 (km / h)
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