A car travels 62.5km per hour on an ordinary highway, and the speed on the highway is 90km less than three times the speed on an ordinary highway What's the speed of the car on the highway?

A car travels 62.5km per hour on an ordinary highway, and the speed on the highway is 90km less than three times the speed on an ordinary highway What's the speed of the car on the highway?

62.5 * 3-90 = 97.5 (km)

A car runs at a speed of 90km / h for 4.5km on a straight expressway, and the power of the car is 60kW at this time. How long does it take for the car to pass the road section? How much work does the traction force do when the car runs on the road section? How many kilograms of gasoline can the gasoline tank hold? The effective volume of the car's gasoline tank is 60L, ρ gasoline = 0.71 × 103kg / m3?

It is known that: speed v = 90km / h, distance S = 4.5km, power P = 60kW = 60 × 103w, Volume V = 60L = 0.06m3, ρ gasoline = 0.71 × 103kg / m3? (2) the work done by the traction force of the vehicle when driving on the road section w =? (3) the mass of gasoline M =? (1) ∵ v = St ∵ time used: T = SV = 4.5km90km / h = 0.05h = 180s; (2) ∵ P = wt ∵ work done by traction force: w = Pt = 60 × 103w × 180s = 1.08 × 107j; (3) gasoline tank can hold gasoline: M = ρ gasoline, v = 0.71 × 103kg / m3 × 0.06m3 = 42.6kg 6 kg

The total length of Beijing Shanghai expressway is about 1262km. A car runs from Beijing to Shanghai at a speed of 108km per hour
Beijing Shanghai expressway is about 1262km long. A car runs from Beijing to Shanghai at a speed of 108km per hour
(1) How far is the bus from Beijing in t hours? If t = 7, how far is it from Beijing?
(2) How far is the bus from Shanghai in t hours? If t = 11, how far is it from Shanghai?
All equations, send detailed equations in photos or in words

(1)108t 108×7 (2)1262-108t
1262-108×11