Answer:the candidate polled 216000 votes
Explanation:
The total number of votes(both valid and invalid) is 600000. 10% of the total number of votes were declared invalid. This means that the total number of invalid votes is
10/100× 600000 = 0.1×600000 = 60000 votes. Total number of valid votes = 600000 - 60000 = 540000.
If a candidate got 40% of the valid votes, it means that the total number of votes that the candidate got would be
40/100×540000 = 0.4 × 540000 = 216000 votes