(Q) Mr. Bundda travels in his car and covers 1/4 part of his journey with 8 km/h, 3/5 part with 6 km/h and remaining 3/20 part with
a speed of 10 km/h. Find out his average speed during the whole journey
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Step-by-step explanation:
- 1/4(8)+3/5(6)+3/20(10)
- on taking lcm we get 20 as lcm
- so we multiply first term by 5; second term by 4 and third term by 1
- so we get the following expression
- {5(8)+12(6)+3(10)}/20
- =(40+72+30)/20
- =142/20
- =7.1
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