Efficiency, power, irradiance and speed problem

[TyErd]

Homework Statement

I've attached the question

Homework Equations

The problem is I don't know what equation(s) I have to use.

The Attempt at a Solution

This question my part of my thermofluid dynamics course but I cannot find a formula in my textbook that uses an irradiance (1000W/m^2) term.

 

[RTW69]

Think about this problem. You have a 1 m² solar collector. It is 30% efficient. If 1000 W/m² is falling on a 1 m² that is 30% efficient how much power is the solar panel producing(in KW)? Compare with the power of the car.

 

[TyErd]

so that means 300W or 0.3kW of power is being produced.
0.3/200=0.0015
how do i relate this to speed

 

[CWatters]

If it takes 200,000W to go at speed X how much faster is it likely to go if the power available is increased to 200,300W ? Hint: it's a multiple choice question and its not going to go >50% faster :-).

 

[TyErd]

yes its fair enough that it won't go 50% faster or 10% or even 4%, but how would I go about getting an exact answer?

 

[aralbrec]

How about W=Fd, P = F*v, assume F doesn't change (much)