Time and Distance Practice Test 3 with solutions

Question : 15 of 40

Marks: +1, -0

A car travelling with

5/7

of its actual speed covers 42 km in 1 hr 40 min 48 sec. What is the actual speed of the car?

Solution:

t = 1 hr 40 min. 48 sec. =

(1+{40}/{60}+{48}/{60×60})

hr =

(1+2/3+1/{75})

hr
=

{126}/{75}

{42}/{25}

hr
Let actual speed be x km/hr., then
⇒

5/7 x × {42}/{25}

= 42
∴ x = 35 km/hr

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