Question

Cost of 10 mangoes is Rs. 100. The cost of 18 mangoes is__

• A. Rs. 18
• B. Rs. 108
• C. Rs. 200
• D. Rs. 180

Answer 1

The correct option is D Rs. 180

Here, the cost of mangoes is directly proportional to the number of mangoes bought.
So, if $10$ mangoes costs $Rs.100$, then $1$ mango will cost $Rs.\frac{100}{10}=Rs.10$
Therefore, $18$ mangoes will cost $=18\times \frac{100}{10}=Rs.180$