Question

A painter can paint a wall of area 300sqm in 15 hours if he works at a constant speed find the time taken by him to paint a wall of 20sqm?

Answer 1

Answer:

1 hr

Step-by-step explanation:

300sqm=>15 hrs

by unitary method,

1sqm=15/300=1/20 hrs

20sqm= 1/20 * 20= 1 hr.