Question

The cost of digging a well after every metre of digging, when it costs Rs 150 for the first metre and rises by Rs 50 for each subsequent metre.​

Answer 1

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We can write the given condition as;

Cost of digging a well for first metre = Rs.150

Cost of digging a well for first 2 metres = Rs.150 + 50 = Rs.200

Cost of digging a well for first 3 metres = Rs.200 + 50 = Rs.250

Cost of digging a well for first 4 metres = Rs.250 + 50 = Rs.300

And so on..

• Clearly, 150, 200, 250, 300 … forms an A.P. with a common difference of 50 between each term.

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Answer 2

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