R did 4/7 part of a work on first day. He did 2/5 part of the remaining work on second day. Now the remaining work is 18 units. What is the total work (in units)?
Show answer & explanation
Correct answer: D
Explanation
Work remaining after the first day = 1 - 4/7= 3/7
On the second day, 2/5 of the remaining work was done; thus, the remaining work = 3/5 × 3/7= 9/35
9/35 part = 18 units
Total work = 18 × 35 / 9= 70 units