In construction , floor space is given for staircase. If a second floor is 270cm above the first floor and the contractor is using steps with 18cm rise and 30cm treat , how long will the railing goes from the first floor to the second floor

Of the following, which statement or statements accurately reflect a way in which credit can be safer than cash? i. if your credit card gets stolen, you can cancel it and get your money back. ii. it is harder to lose a single credit card than a large number of bills. iii. if a merchant does not honor the agreement, you can call the credit company and dispute the charges. a. i and iii b. ii only c. iii only d. i, ii, and iii