Question : One car moving on a straight road covers one third of the distance with 20 𝑘𝑚/ℎ𝑟 and the rest with 60 𝑘𝑚/ℎ𝑟. The average speed is
(A) 40 𝑘𝑚/ℎ𝑟
(B) 80 𝑘𝑚/ℎ𝑟
(C) 46 2/3 𝑘𝑚/ℎ
(D) 36 𝑘𝑚/ℎ𝑟
Answer : option (D)
Solution :
One car moving on a straight road covers one third of the distance with 20 𝑘𝑚/ℎ𝑟 and the rest with 60 𝑘𝑚/ℎ𝑟. The average speed is
with
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