Bike Ride

Nirmala and Riki live 9 kilometres away from the nearest market. They both want to arrive at the market at exactly noon. What time should each of them start riding their bikes?
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Bike Ride

Nirmala and Riki live in different villages.

Both villages are $9$ kilometres away from the nearest market.

Nirmala rides her bike at $6$ kilometres per hour and Riki rides his

at $4$ kilometres an hour.

They both want to arrive at the market at exactly noon.

What time should each of them start riding?