Question 51

The ratio of speeds of two aeroplanes is 7 : 15. If the first flight covers a distance of 1050 km in 3 hours, then what is the speed of the 2nd flight?

Solution

The ratio of speeds of two aeroplanes is 7 : 15.

Let's assume the speeds of two aeroplanes are 7y and 15y respectively.

If the first flight covers a distance of 1050 km in 3 hours.

$$7y=\frac{1050}{3}$$

$$y=\frac{150}{3}$$

y = 50

Speed of the 2nd flight = 15y

= $$15\times50$$

= 750 km/h

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