The cost of a drum dryer is Rs.
Reliance Industries technical mcq question, verified with a worked answer. Free to practise - no sign-up.
The cost of a drum dryer is Rs. 5 lakhs. Using the 0.6 power rule for chemical equipment cost estimation, the cost of a drum dryer with triple the surface area in lakhs of rupees is:
Show answer & explanation
The 0.6 power rule (or six-tenths rule) states that the cost of equipment scales with the ratio of the new capacity to the old capacity raised to the power of 0.6. Since the surface area (capacity) is tripled, the cost is multiplied by 3^0.6.
Step-by-step Derivation:
Step 1: Identify the formula for the 0.6 power rule: Cost_new = Cost_old * (Capacity_new / Capacity_old)^0.6.
Step 2: Identify the given values: Cost_old = 5 lakhs, Capacity_new / Capacity_old = 3 (since the surface area is tripled).
Step 3: Substitute the values into the formula: Cost_new = 5 * (3)^0.6.
Step 4: Rearrange the expression to match the options: 3^0.6 * 5.