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

Answer:

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Step-by-step explanation:

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

Step-by-step explanation:

Cost of digging first metre =50

cost of digging second metre =150 +50 200

cost of digging third metre =200+50 =250

cost of digging fourth metre =250+50=300

the list of numbers is 150,200,250,300......

here a2-a1 =200-150=50

a3-a2 =250-200=50

a4-a3 =300-250=50

the list of numbers formed an AP a=150,d=50