Question

1. If the 9th and 21st terms of an A.P. are 75 and 183<br />respectively, find its 81st term.<br />(HOTS)​

Answer 1

Answer:

Correct option is

D

Rs. 14875

Area of room → Length X Breadth

Area of room  → 1150 ×630  → 724500 sq. cm

Area of 1 tile → 23×9  → 207 sq. cm

Number of tiles required  → Area of tileArea of room

Number of tiles required  → 207724500  → 3500

Cost of tiling  → (Number of tiles) × (Cost of 1 tile)  → 3500×4.25  → 14875