Q.A worker is given a Time Allowed of 8 hours for a job at a Time Rate of ₹25 per hour, and completes the job in 6 hours. Calculate the Bonus and Total Earnings under the Rowan Premium Bonus Scheme.

The worker saves 2 out of 8 allowed hours, so under Rowan the bonus is that 2/8 fraction applied to the wage value of the 6 hours actually worked.

Step 1 — Time Saved: Time Allowed − Time Taken = 8 − 6 = 2 hours.

Step 2 — Time-Saved Ratio: Time Saved ÷ Time Allowed = 2 ÷ 8 = 0.25 (i.e. 25%).

Step 3 — Bonus: Time-Saved Ratio × Time Taken × Time Rate = 0.25 × 6 × ₹25 = ₹37.50.

Step 4 — Basic Wages: Time Taken × Time Rate = 6 × ₹25 = ₹150.

Step 5 — Total Earnings: ₹150 + ₹37.50 = ₹187.50. …

A common error is computing the Time-Saved Ratio using Time Taken as the denominator (2 ÷ 6) instead of Time Allowed (2 ÷ 8) — the ratio is …