Question

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Two bikers are covering distance from A to B. If their speeds are in the ratio of 3:7, calculate the ratio of
time taken by them to cover the distance.
lal 3.7
(b) 7:3
(c) 3:10
(d) 7:10
please explain also ​

Answer 1

Step-by-step explanation:

Speed = distance/time

s1 = d/t1

s2 = d/t2

$\frac{s1}{s2} = \frac{3}{7}$

$\frac{ \frac{d}{t1} }{ \frac{d}{t2} } = \frac{3}{7}$

$\frac{d}{t1} \times \frac{t2}{d} = \frac{3}{7}$

$\frac{t2}{t1} = \frac{3}{7}$

$\frac{t1}{t2} = \frac{7}{3}$

Option (b) 7:3