A car travelling with of its actual speed covers 42 km in 1 hr 40 min 48 sec. F

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A car travelling with of its actual speed covers 42 km in 1 hr 40 min 48 sec. Find the actual speed of the car.

Options:

A . 17 6 km/hr 7

B . 25 km/hr

C . 30 km/hr

D . 35 km/hr

Answer: Option D

Time taken = 1 hr 40 min 48 sec = 1 hr 40
4
min = 1
51
hrs =
126
hrs.
5
75
75

Let the actual speed be x km/hr.

Then,
5
x x
126
= 42
7
75

x =

42 x 7 x 75

= 35 km/hr.
5 x 126

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