Join Our JEE Preparation Group
Prep with like-minded aspirants; Get access to free daily tests and study material.
Sign in
Please select an account to continue using cracku.in
↓ →
Join Our JEE Preparation Group
Prep with like-minded aspirants; Get access to free daily tests and study material.
A 1000 MW thermal power plant burns $$10^6$$ kg of coal in one hour. How many kg of coal is burnt to produce the power required to light up a 100 W lamp for 8 hours.
Correct Answer: 0.8
In one hour the plant delivers $$1000\text{ MW} \times 1\text{ h} = 10^6\text{ kWh}$$ from $$10^6$$ kg of coal, i.e. 1 kWh per kg. The lamp uses $$0.1\text{ kW} \times 8\text{ h} = 0.8\text{ kWh}$$, so 0.8 kg of coal is burnt.
Was this solution helpful?
Predict your JEE Main percentile, rank & performance in seconds
Educational materials for JEE preparation
Ask our AI anything
AI can make mistakes. Please verify important information.
AI can make mistakes. Please verify important information.