100+ Time and Work Aptitude Questions and Answers Pdf - 1

Ans: B

B’s daily earning = Rs. (300 - 188) = Rs. 112.

A’s daily earning = Rs. (300 - 152) = Rs. 148.

C’s daily earning = Rs. [(300 – (112 + 148)] = Rs. 40.

Ans: D

Number of pages typed by Ronald in 1 hour = $${32} / {6}$$ = $${16} /{3}$$.

Number of pages typed by Elan in 1 hour = $${40} / {5}$$ = 8.

Number of pages typed by both in 1 hour = $$({16} / {3} + 8)$$ = $${40} / {3}$$.

∴ Time taken by both to type 110 pages

= $$(110 × {3} / {40})$$hrs = $$8{1}/{4}$$hrs = 8 hrs 15 min.

Ans: C

3 men’s 1 day’s work = $${1} / {20}$$

5 boys 1 day’s work = $${1} / {30}$$

(3 men + 5 boys) 1 day’s work = $$({1} / {20} + {1} / {30})$$ = $${5} / {60}$$ = $${1} / {12}$$.

∴ 3 men and 5 boys will complete the work in 12 days.

Ans: A

Reena’s 1 hour’s work = $${1} /{6}$$

Aastha’s 1 hour’s work = $${1} /{4}$$

Shloka’s 1 hour’s work = $${1} /{12}$$

(Reena + Aastha + Shloka)’s 1 hour’s work

= $${1} /{4}$$ + $${1} /{6}$$ + $${1} /{12}$$ = $${6} / {12}$$ = $${1} / {2}$$.

Hence Reena, Aastha and Shloka together take 2 hours to complete the work.

Ans: C

(1 man + 1 woman)’s 1 day’s work = $${1}/{6}$$ + $${1} /{9}$$ = $${5}/{18}$$.

Remaining work = $$(1 – {5} / {18})$$ = $${13} / {18}$$

Work done by 1 boy in day = $${1} /{18}$$.

∴ Number of boys required = $$({13} / {18} × 18)$$ = 13.