ModMaths Variation

When asked to create a Joint Variation. I said :

"Chong Ah Kuat goes to the market everyday at 7:30 waking up at 6:30, taking an hour to ride his bicycle to a market at 50km/h on a flat straight road with mild turns and his shopping efficiency was at an average. Today he tried a new route, but he had to go up a steep hill which raised the angle of elevation by 40degrees thus forcing him to use more energy to go up the mountain and drastically decreasing his speed to 25km/h. He reaches the market an hour extra and his shopping effeciency had dropped from average to below average"