question_answer

 

A)  Rs 780                

B)          Rs 860             

C)  Rs 920                

D)          Rs 1300

Correct Answer: B

Solution :

As we have,  =  ` 140 or Train = ` 140 + Car                 ...(i) Now, we are given    =Rs 1280 or 2 Cars + 2 Trains = Rs 1280 \[\Rightarrow \]2 Cars + 2(140 + Car) = Rs 1280                                                 [From (i)] or 4 Cars + 280 = Rs 1280 \[\Rightarrow \]4 Cars = Rs 1000 \[\Rightarrow \]1 Car \[=\frac{1000}{4}\]= Rs 250                .... (ii) Now, we also have = ` 820 or Car + Bear + (140 + Car) = ` 820 [from (i)] \[\Rightarrow \]2 Cars + Bear + 140 = 820 or 2  250 + Bear + 140 = 820 [from (ii)] \[\therefore \]Bear\[=\text{ }820-640=180\] \[\Rightarrow \] Bear = ` 180 Now, required cost of  \[=2\times 250+2\times 180\]= ` 860