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DSNL charges a fixed rental of ₹ 350 per...

DSNL charges a fixed rental of ₹ 350 per month. It allows 200 calls free per month. Each call is charged at ₹ 1.4 when the number of calls exceeds 200 per month and it charges ₹ When the number of calls exceeds 400 per month and so on. A customer made 150 calls in February and 250 calls pin March. By how much per cent the each call is cheaper in ,March than each call in February?

A

0.28

B

0.25

C

`18.5%`

D

none of these

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The correct Answer is:
A
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