Jane and sali cycled along the same 63 km route. jane took 3.5 hours to cycle the 63 km. sali started to cycle 4 minutes after jane started to cycle. sali caught up with jane when they had both cycled 30 km. jane and sali both cycled at a constant speeds. work out sali's speed in km/h.

Sali's speed was 18.75 km/h.

Step-by-step explanation:

Jane took 3.5 hours to cycle the 63 km.

As,   , so the speed of Jane will be:  

Suppose, the speed of Sali is   km/h

Sali caught up with Jane when they had both cycled 30 km.

So, the time required for Jane to cycle 30 km and the time required for Sali to cycle 30 km  

Given that, Sali started to cycle 4 minutes or after Jane started to cycle. So, the equation will be.......

Thus, the speed of Sali was 18.75 km/h.

circle area = pi * radius^2

if diameter = 10 then radius = 5

circle area = pi * 5^2

circle area = pi * 25

circle area = 78.5398163397 square units

step-by-step explanation: