[" 13.A man can reach a certain "],[" place in "30" hours.If he reduces "],[" his speed by "(1)/(15)" th,he comes "10],[" km less in that time.Find his "],[" speed in "km" per hour."]

A man can reach a certain place in 30 hours. If the reduces his speed by1/(15)t h he goes 10 km less in that time. Find his speed. 4 k m//h r b. 5 k m//h r c. 5 1/2k m//h r d. 6k m//h r

A man can walk 8 km in 1 hour 15 minutes .Find his speed.

A person has to cover 360 km distance. If he increases his speed by 10 km/h he reaches 3 hours early. Find his initial speed.