Question

the cost of digging a well after every metre of digging when it costs 150 for the first meter and rises by rs 50 for subsequent meter ​

Answer 1

Step-by-step explanation:

cost of digging 1 metre =150

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 formed is 150,200,250,300

a2-a1 =200-150=50

a=150 and d= 50

Answer 2

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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