Chain Rule Q67

67. If 15 toys cost Rs, 234, what do 35 toys cost?

Answer:

 Let the required cost be Rs. x. Then,

More toys, More cost (Direct Proportion)

. 15 : 35 : : 234 : x  (15 x x) = (35 x 234)  x=(35 X 234)/15 =546

Hence, the cost of 35 toys is Rs. 546.