# Marginal Rate of substitution

Answer the following questions based upon the information given below

Q = K^(1/2)L^(1/2), WK = \$20 WL = \$5

1. What relative amounts of capital and labor will be employed to
maximize output?
a. equal amounts of capital and labor
b. four times as much labor as capital
c. twice as much capital as labor
d. none of the above

2 Having a budget of \$16,000, what amounts of capital and labor will be
employed?
a. 200 units of K and 200 units of L
b. 400 units of K and 1600 units of L
c. 200 units of K and 1600 units of L
d. 100 units of K and 40 units of L
e. none of the above

3. If the proper amounts of K and L are employed
a. MRS should equal WL/WK
b. MPL/MPK should equal WL/WK
c. WK/MPL should equal WL/MPK
d. all of the above
e. two of the above

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#### Solution Preview

...hat WK=\$20 and WL=\$5, put various parameters in the above expression as under
(0.5K^(-0.5)L^0.5)/20=(0.5K^0.5L^(-0.5))/5
5*(0.5K^(-0.5)L^0.5)=20*(0.5K^0.5L^(-0.5))
K^(-0.5)L^0.5=4K^0.5L^(-0.5)
L=4K
So, we find that option b is correct

Answer: b. four times as much labor as capital

2 Having a budget of \$16,000, what amounts of capital and labor will be
employed?
a. 200 units of K and 200 units of L
b. 400 units of K and 1600 units of L
c. 200 units of K and 1600 ...