Question
Together, Ali and Imran take 40 days to complete a project.
After working jointly for 32 days, they left, and Zara completed the remaining work in 4 days. How much time would Zara take to complete 70% of the work on her own?Solution
ATQ,
Fraction of work done by Ali and Imran = 32 / 40 = 4/5
Fraction of work done by Zara = 1 - 4/5 = 1/5
So, number of days taken by Zara alone to complete the entire work = 4 ÷ (1/5) = 20 days
So, time taken by Zara to complete 70% of the work = 20 × 0.70 = 14 days
Tanya throws a ball vertically upwards, which rise to a height of 60 m. Which of the following statements is NOT correct? [Take g = 10 ms–2
A particle enters a uniform magnetic field at some angle other than 90° or 0° to the field. The path followed by the particle is:
When a metal reacts with dilute hydrochloric acid, it produces:
Humans have _____ lobes in the left lung.
Which part of the human brain controls voluntary actions?
Mycorrhiza is a symbiotic association between :
Which of these is not a function of proteins?
You are given two liquid mixtures "X" and "Y". Both appear to be homogeneous, but "X" does not scatter light
whereas "Y" scatters light. Whic...
Which of the following is a primary pollutant?
One can distinguish a telescope from a microscope by observing –
Relevant for Exams:
